312

DISCUSSION.

Mr. S. D. CHALMERS was particularly interested in the method of tracing rays through a system. The relation ships between the various quantities involved was of considerable interest. The author's methods of treatment seem to present many possibilities in addition to the cases actually quoted. By extending them he may simplify very considerably many important computations. Some time ago he had used somewhat similar methods to express the image position of an object in terms of the separations of the surfaces and the height of the intercepts of a standard ray on the different surfaces.

Mr. T. SMITH, in reply, agreed that if one had time to go into all the cases which might arise many interesting and useful results would follow. It was easy from the formulæ he had quoted to obtain an idea of what other general relations are likely to exist in an optical system, and to extend the meaning to be attributed to various conditions, such, for example, as the sine condition of Abbé. He hoped to treat more fully of these matters later.

A paper on "The Accuracy of the Lens and Drop Method of Measuring Refractive Index" by Mr. H. REDMAYNE NETTLETON, B.Sc., was taken as read in the absence of the author.

The paper describes a simple arrangement for comparing on an optical bench the refractive indices of liquids for monochromatic light by the lens and drop method. The accuracy and sensibility of the method are discussed, special stress being laid on the choice of lenses and on the manner of correcting for the thickness of lens used. Attention is drawn to the accuracy obtainable in measuring a small radius of curvature of a lens face in terms of the well-known refractive index of water, and in measuring the refractive index of the glass of a lens.

Extinction des Radiations Solaires dans l'Atmosphère Terrestre. ("Extinction of Solar Radiations in the Terrestrial Atmosphere"). By F. LINDHOLM. Upsala: Librairie A.B. Akademiska Bokhandeln.

THE experiments described in this monograph had for their object the determination of the coefficient of atmospheric transmission, and were carried out at the Physical Institute of the University of Upsala. The spectrobolometric method was adopted, and the experimental arrangements and process of taking the measurements are explained in detail, with full tables of the results obtained. It was found that the transmission decreases with the wave-length, the values calculated for the extreme infra-red being uncertain and often forming exceptions to the general rule.

L'Expédition Franco-Suédoise de Sondages Aériens à
Kiruna. ("The Franco-Swedish Expedition of Aerial
Soundings at Kiruna"). By H. MAURICE. Upsala:
Librairie A.B. Akademiska Bokhandeln.
THIS monograph contains interesting details of the Franco-
Swedish expedition sent to Kiruna to study the tempera
ture, &c., of the upper atmosphere. For this purpose
24 balloons containing registering instruments were sent up

{CHEMICAL NEWS, June 25, 1915

in three series in the years 1907-8-9, 16 of them being found and returned by the find ers some time (occasionally years) after having been liberated. The results were compared with those obtained by similar experiments made near Paris and in tropical regions. It was found that in the Polar circle, as in medium latitudes, there is a zone throughout which the temperature no longer decreases as the altitude increases, but may even become higher-the stratosphere. The temperature of the upper air (above 14,000 m.) in winter in the Polar circle is not lower than that above Paris at the same height, though the temperature of the earth is a good deal lower, and the average temperature is higher above Lapland than in Equatorial regions at the same altitude.

CORRESPONDence.

3-NAPHTHOL IN DISINFECTANTS.

To the Editor of the Chemical News.

SIR,-On folio 286 of your last week's issue, in the report of the meeting of the Society of Public Analyts, there is an abstract of a paper by Mr. Bodmer on 8-naphthol in disinfectants. In the report it states that Mr. Bodmer found that "Richmond (Analyst, 1907, xxxii., 151) recommends a diazotised benzidine solution for the detec tion of B-naphthol in milk." I would ask you to state that the paper in which the solution is described is by Mr. E. Holl Miller and myself. It was due to a suggestion of his that tetrazonium salts condensed easily with 8-naphthol in neutral solution to form a fine red colouring matter while other phenolic compounds condensed with difficulty, that we worked out the method depending on the use of benzidine for the detection of B-naphthol, and I am anxious that Mr. Miller's name should have at least equal prominence with my own.—I am, &c.,

H. DROOP RICHMOND. CHEMICAL NOTICES FROM FOREIGN SOURCES.

Bulletin de la Société Chimique de France.
Vol. xvii.-xviii., No. 6, 1915.

Cuprous Carbonate.-P. Carles.-When the ammoniacal compound of copper is prepared by subjecting copper alternately to the action of air and liquid ammonia the process comes to a standstill after a time. This is due to the action of the carbon dioxide of the air which forms a protective layer of cupric carbonate. If this is left in contact with the metal cuprous carbonate is formed. It is a green powder, insoluble in pure water and in water containing ammonia, and fairly stable in air. It dissolves in acids with effervescence.

Dehydration and Etherification of Cyclohexanol and p-Methylcyclohexanol by Oxalic Acid.- M. A. Juéry.-When three molecules of oxalic acid are employed to dehydrate one of cyclohexanol good yields of hydrocarbon are obtained. If less than two molecules are used the proportion of hydrocarbon is reduced, and the oxalic ethers of the cyclohexanol are obtained. With one molecule of acid to two of alcohol etherification occurs but no dehydration. The author has prepared two neutral oxalic ethers of p-methylcyclohexanol, one crystallised and the other liquid, which are possibly the two isomers foretold theoretically.

Transformation of Antipyrine into Diantipyrinemethane by Formic Aldehyde. Ch. Astre.-Antipyrine can be transformed into diantipyrinemethane in a few minutes by the action of formic aldehyde in presence of water only. A trace of alkali is sufficient to retard the action and render it incomplete. Pyramidon acts still more energetically than mineral alkalis, and absolutely stops the transformation.

July 23, 1915

313

INDEX.

tives, electrolytic dissociation,
36

Acid, benzoic, rotatory powers of
some esters of, with optically
active secondary alcohols, 33
boric, determination of small
quantities, 204

In-

in butter, detection and
mation, 143
neutralisation curve of, 285
carbonic, thermal properties at
low temperatures, 263
chromic, 288

cia-caronic, and derivatives, 48
d-diphenylsuccinic, conversion

of l-phenylchloroacetic acid
into, 33

glycerophosphoric, of lecithin,

252
hydrocyanic, rate of liberation
from commercial kinds of lin-
seed, 19

molybdic, recovery of, aao

I-

and a-naphthoic, rotatory
powers of esters of, with
optically active secondary
alcohols, 33

nitrous, action on the amines,
255

Oxalic, dehydration and etheri-
fication of cyclohexanol and
p-methylcyclohexanol by, 312|
1-phenylchloroacetic, conversion

into d-diphenylsuccinic acid,
33
phenylpyruvic, tautomeriam of,
108
phosphoric, production and

fertiliser value of citric-
soluble, 260, 268

succinic, optical rotatory power
of derivatives of, in aqueous
solutions of inorganic salts, 34
sulphuric, supply for Govern.
ment contractors, 204
Acids, amino, attempts to resolve
metallic salts of, 23
boric, properties of solutions of,
in alcohol, 22
oxybenzoic, molecular weights
of, 96
Acrolein, heat of formation, 252
Actinium, recovery from the olary

ores, 59
Addenbrooke, G. L, relative

losses in dielectrics in equi-
valent electric fields, steady
and alternating (R. M.S), 167
Addicks, L., commercial classi
fication of refined copper, 73
Adsorption formula, Gibbs, simple
method of deriving, 284

adopted in the estimation of
the nitrogenous constituents
of extracts derived from, 249
Alchemical Society, 47, 203, 250
Alchemical doctrine, the phalic
element in, 203

tradition, philosophical chan-
nels of, 47
Alchemy, the beginnings of, 250
Alcohol in commerce, 201

properties of solutions of boric
acids in, 22

Alcoholic liquids, determination
of iodine indices in, 72
solutions, osmotic pressure of,

10

Aldridge, W., "First Course of

Practical Chemistry for Rural
Secondary Schools" (review),
143

Alkali metals, polysulphides of, 10
bicarbonates, dissociation pres-
sures of, 10

Alkaline earth metals and alkalis,
separation, 217

metals, anhydrous polysulphides
of, 48

sulphites, catalysis in oxidation
of, 215

Allen, H. S., numerical relation-
ships between electronic and
atomic constants, 283

not manufacture, 75
Animals, contribution to our know-
ledge of coat-colour in, 210
Anthocyan, the later researches
on, 87
Antipyridine, transformation into
diantipyrine-methane by for-
mic aldehyde, 312
Apparatus, boiling-point, 22
glass, provision for educational
purposes, 164
Arsenic solutions, blood charcoal

as purifying agent for, pre-
vious to titration, 280
Aspyrin, decomposition by water,
48

Astre, C., transformation of anti-

pyrine into diantipyrinemeth-
ane by formic aldehyde, 312
Atack, F. W., "Intermediate

Practical Chemistry" (review),

of functional activity upon
the metabolism, blood flow,
and exudation io organs,
130
Barger, G., and W. W. Starling,
blue adsorption compounds of
iodine, 32

Barker, T. V., attempt to resolve
metallic salts of amino acids
and other co-ordinated com-
pounds, 23
Barnebey, O. L., permanganate
determination of iron in pre-
sence of chlorides, 114, 124,
140, 147
Bauer, E., and A. Haller. (See
Haller, A.)

M., A. Brochet, and A. Cabaret.
(See Brochet, A.)
Beacall, T., and others, "Dye-

stuffs and Coal-tar Products"
(review), 214
Beale, Sir W. Phipson, An
Amateur's Introduction to
Crystallography" (review),

250
Beard, E., and W. Cramer, sur-
face tension and ferment ac-
tion, 236

Beeswax, Corean, 286
Benzaldehyde, 264
Benzene, bromination, 48
Benzofulvanol and benzofulvene,
264
Bertrand, G., and M. Rosenblatt,
thermoregeneration of dif.
ferent diastases of yeast,

120

Beta-naphthol in disinfectants
detection, 286, 312
Biochemical Society, 72, 191, 286
Bismuth, organo derivatives of,

22

stability of derivatives of quin-
quivalent, 22
Bissett, C. C., removal of sulphur
from silver, 10
Blair, H., and S. H. Collins. (See
Collins, S. H.)

Blood flow in organs, effect of

functional activity upon, 130
charcoal as a purifying agent for
arsenic solutions previous to
titration, 250
Bodmer, R., note on the detection
of beta-naphthol in disin-
fectants, 286
Bodroux. F., preparation of some
ether salts, 144
Boismenu, E., and M. Francois.
(See Francois, M.)
Bone, W. A., gaseous combustion
at high pressures, 116
H.L. Callendar, and H. J. Yates,
bolometric method of deter-
mining the efficiency of radiat-
ing bodies, 142

314

Books, Reviews and Notices of-
"Air, Water, and Food from a

Sanitary Standpoint," 131
"Agricultural and Commercial
Statistics, Bulletin of," 120
"Aluminium Facts and Figures,"
83

"Analysis, Chemical, Technical

Methods of," 12, 35
"Annuaire pour l'An 1915," 96
"Armour Institute of Techno-
logy, Bulletin," 120
Assaying, Text-book of Prac-
tical, 83

Atmosphere, Extinction

of

Solar Radiations in the Ter-
restrial" (Fr.), 312
"Australia's Trade with Ger-
many," 72
"Beet-sugar Chemists, Practi-
cal Handbook for," 59
"Berzelius, Jac., Letters of,"

"Brazil," 312

"British Journal Photographic
Almanac," 71
"Canada, Department of Agricul
ture, Experimental Farms,
Report of the Dominion
Chemist," 72

"Chemistry Analytical, Muter's
Short Manual of," 143
"Chemistry, Elementary Prac-
tical," 47

"Chemistry, First Course of

Practical, for Rural Second-
ary Schools," 143
"Chemistry, Inorganic, Ad.
vanced," 120

"Chemistry, Inorganic, Text-
book of," 58
"Chemistry, Intermediate Prac-
tical," 71

"Chemistry, Manual of," 96
"Chemistry, Organic, Outlines
of," 59

"Chemistry, Physical, Elements
of," 47

"Chemistry, Physical, Practi-
cal," 167

"Colloids, Chemistry of, and
some Technical Applica-
tions," 167
"Commercial

Engagements,

Effects of the War on," 47

"Crystal Structure, X-Rays

and," 287

"Crystallography, an Amateur's

Introduction to," 250

"Cyanogen Compounds, the

Chemistry of," 71

"Dyestuffs and Coal-tar Pro-

ducts," 214

"Electric Furnace in Metal-

"

lurgical Work. 300
"Enamel Industry, the Raw
Materials for the," 12
"Explosives, Appendices to the
Thirty-eighth Annual Re-
port of His Majesty's In-
spectors of," 96
"Farmer as a Manufacturer,"
72
"Food, Air, and Water from a
Sanitary Standpoint," 131
"Food Industries," 12
"Food Products," 35
"Franco-Swedish Expedition of

Aerial Soundings at Kiruna"
(Fr.), 312
"Germany, Australia's Trade
with," 72
"Heat. Light, and Sound, Prac-

tical," 143
"Imperial Institute, Bulletin,"

204

"Ionomagnetic Rotation "(It.),
108

"Johns Hopkins University,

Discussion of Evidence on
the Solvate Theory of Solu
tion obtained in the Labora-
tories of," 227
"Leavening Agents," 204

Books, Reviews and Notices of-

The Little Journal," 144,
"London University Guide,"

35
"Molecular Associatlon," 214
"Muter's Short Manual of
Analytical Chemistry," 143
"Neptune," 288
"O Espelho. (The Mirror'),"

227

"Oedema and Nephritis," 214
"Oils, Examination of Lubri-
cating," 47

"Oils, Fats, and Waxes, Chemi-
cal Technology and Analysis
of," 250
"Oils, Hydrogenation of," 156:
"Oils, Resins, and Paints,

Manual of," 214
"Paints and Painting, Chemis-
try of," 250

"Paper Makers' Directory,"

"

July 23, 1915

Bread and four, pure, 176
Bridge, S. W., soluble chlorides
and total chlorides in some
English cokes, 143
Brinkworth, J. H., measurement
of the specific heat of steam
at atmospheric pressure and
105.4° C., 263
Briscoe, H. V. A., redetermina-
tion of the atomic weight of
tin, 21

and others," Text-book of In-
organic Chemistry" (review),
58

British chemical industry, the
future of, 202, 211, 224, 236
dyes, 20

Empire Industrial League, 216
imperialism, German kultur de.
fined, 109

industries, new, 165
laboratory ware, 192
Science Guild, 164
Brochet, A., catalytic reduction
of indigo, 215

M. Bauer, and A. Cabaret,
catalytic hydrogenation of
liquids under the influence of
common metals at moderate
temperatures and pressures,
276

poses, List of," 300
"Science and Industrial Prob-
lems," 287

"Silicates, the Constitution of

the Natural," 72
"Soil Condition and Plant
Growth," 203

"Solar Radiations, Extinction

of, in the Terrestrial Atmo-
sphere" (Fr.), 312
"Solution, Discussion of Evi-

dence on the Solvate Theory
of, in the Laboratories of
Johns Hopkins University,"
227

"Spectra, Absorption, of Solu-

tions as Studied by means
of the Radio-micrometer,"
264
"Spectroscopy of the Extreme
Ultra-violet," 71

Tables, Annual, of Constants
and Numerical Data" (Fr.),
131, 250
"Technology, Chemical, and
Analysis of Oils, Fats, and
Waxes," 250
"Ultra-violet, the Spectroscopy
of the Extreme," 71
"University College of North
Wales Calendar," 144
"University of London Appoint-
ments Board, its Aims and
Work," 120

and xylene, 48

of toluene, progressive, 10
Bromine method of determining
phenol, 191

Bromley, H. A., chemical analysis

of paper, 136

Brown, G. E., "British Journal
Photographic Almanac" (re-
view), 71

W. D., determination of copper

in steel, 195

recovery of molybdic acid, 220
Bruce, E. L., microscopic tests on

opaque minerals, 121
Bryan. G. H., and R. Jones, dis-

continuous fluid motion past
a bent plane, with special re-
ference to aeroplane problems,

94
Burnett, H. R., and C. Revis.
(See Revis, C.)
Burrel. G. A., and I. W. Robert-
son, separation of the illu-
minants in mixed coal and
water gas, 150, 159
Butter, detection and estimation
of boric acid in, 143
Butterworth, S., self induction of
solenoids of appreciable wind-
ing depth, 240

Calcium theobrominate, crystal-
line, 228
Calculation of thin objectives, 311
Callendar, H. L., W. A. Bone,

and H. J. Yates. (See Bone,
W. A.)
Callow, R. H., reaction velocity
in viscous media, 285
Calorimeters, condensation, for
the measurement of latent and
specific heats, 275
Campbell, B., volumetric estima-
tion of ferrocyanides, 286
Camphane series, studies in, 10
Camphor, natural and synthetic,
247, 258

Candle power, unit of, in white
light, 166
Candy, H. C. H., and A. P. Luff.
(See Luff, A. P.)
Carbon, molecule of, 215
chlorides, action of metals on,
252

Carles, P., cuprous carbonate,
312

Cassal, Col. C. E., the future of
British chemical industry, 202
211, 224. 236
Catalysis in oxidation of alkaline
sulphites, 215

use of nickel and its oxides in,
228

Cathode rays, salts coloured by,
27,85

Caven, R. M., and H. J. S. Sand,
dissociation pressures
of
alkali bicarbonates, 10
Cell metabolism, surface tension
as a factor controlling, 236
Cellulose acetate, 132, 144
Challenger, F., and C. F. Allpress,
organo derivatives of bismuth,
and C. K. Tink'er. (See Tinkler,
C. K.)

Chapman, S., lunar diurnal mag.

netic variation and its change
with lunar distance, 117
Chappell, E.. simplification of

arithmetical processes of in.
volution and evolution, 142
Chateau, M., action of halogens
upon mercuric sulphate,
288
Chattaway, F. D., and C. F. B.

Pearce, 2:4-dichlorophenyl-
hydrazine, 34
Cheese, composition of Dutch, and

system of cheese control in the
Netherlands, 286

method for determination of
chlorine in, 191

Chemical Society, 9, 21, 32, 117,
180, 223, 275

Chemical and, dye-stuff industry,
expansion in the United States,

some aspects of industrial, 66,
80, 92, 103
Chesneau, G., chemical study of
coloured glasses of the Middle
Ages, 300
Chlorides in some English cokes,

143
Chlorine in cheese, method for
determination, 191
in coal, 143
in rain and snow, 61
N-Chloroaminocamphor, to
Chlorophyll, function of, 131
green, 204
Chree, C., atmospheric electricity

potential gradient at Kew
Observatory, 1898-1912, 70
difference between the magne ic
diurnal variations on ordinary
and quiet days at Kew Obser.
vatory, 222

Church, Sir A. H., " Chemistry of
Paints and Painting"(review),
250
obituary, 287,

July 23, 1915

71

315

determination of sulphates in,

95

Clarke, F. W., "Constitution of
the Natural Silicates" (re-
view), 72

Clausmann, P., and A. Gautier.

Conductivity, thermal, of a narrow
metal bar, 275
Constants, electronic and atomic,

numerical relationshipa be-
tween, 283

Copals, action of chlorinated
solvents upon hard, 144
Copper, action on water, 56, 67,
78, 91, 102

and tin groups, new method for
analysis of, 206
commercial classification of re-
fined, 75

in steel. determination, 195
sulphates, basic, 48
Corean beeswax. 286
Cornish, Eltreida C. V., and J.

Golding, method for the de-
termination of chlorine in
cheese, 191

Costeanu, N., and E. Rengade.
(See Rengade, E)
Courtot, C., theory of oscillation
of the indene double bond,
264

and V. Grignard. (See Grignard,
V)
Cramer, W., " Directions for a

Practical Course in Chemical
Physiology" (review), 107
reduction of cupric salts by

sugar, 22

surface tension as a factor con-
trolling cell metabolism, 236
and E. Beard. (See Beard, E.)
Crossley, A. W., Science and

Della-Croce, F. V., molecule of
carbon, 215
Diantipyrine, transformation of

antipyrine into, by formic
aldehyde, 312
2:4-Dichlorophenylhydrazine, 34
Dielectrics. relative losses in, in
equivalent electric fields,
steady and alternating
(R. M.S), 167
Dihydroxybenzenes, method of
separating the, 33
Dilution of concentrated solutions,
heats of, 223

Van Babo's law and Kirchhoff's
equation for the latent heat of,
284
3.5-Dimethyl and 3.3-diethyl-5-
methylpyrrolidones, 288
Dinwiddie, J G., separation of

magnesium from lithium by
means of ammonium carbonate
in alcoholic solution, 305
Dioxytriazines, synthesis of sub-

stituted semicarbazides, 300
Disilicon hexachloride, action of
ethyl alcohol on, II
preparation, II
Disinfectants, detection of beta-
naphthol in, 286, 312
Dissociation pressures of alkali
bicarbonates, 10

Dole, R. B., the sulphate in river
waters, 86

Dougherty, G.

T., simplified
ferrous sulphate method for
determination of vanadium in
steel, 304

Douglas, Mrs., aniline dyes, 265
Drew, H. D. K., A. McKenzie,
and G. H. Martin.
McKenzie, A.)

Drug market, cultivation

(See

of

medicinal plants for, 26
Drushel, W. A., preparation and

hydrolysis of ethyl hydr-
acrylate, 153
Ducelliez, F., L. Gay, and A.
Raynaud, bromination of
benzene, toluene, and xylene,

48

Industrial Problems "
view), 287
Cruikshanks, G. S., and T. Gray.
(See Gray, T.)
Crystalline structure, X-rays and,
165

Cullen, J. F., D. A. Lyon, and
R. M. Keeney. (See Lyon,
D. A)

Cupric chloride, action on organic
sulphur compounds, 32
Cuprous carbonate, 312
Curves, instrument for the optical
delineation and projection of
physical, 190

Cyclic evolution of the chemical

elements, 157, 181

Cyclohexane series, molecular
transposition in, 36

scheme, aniline, 84
Dyes, aniline, 265

why America does not manu-
facture, 75
British, 20
Dye-stuff and chemical industry,
expansion in the United States,
105, III

CHEGARY, J., a series of
negations, 241, 253

bexanol, dehydration and
etherification by oxalic acid,

312

dielectrics in equivalent, 167
waves, transmission over the
surface of the earth, 70

Electrolytic solutions,electrostatic
basis for law of mass action
in, 135
Electromagnetic vacuum balance,
285

waves in a perfectly conducting
tube, 70
Electro-titrametric method and
its application to general
analytical chemistry, 173, 184
Electron currents from hot metals,

experiments illustrating novel
properties of, 284
emission from glowing solids,
effects of different gases on,
223
Electrons and ions, emission 'rom

hot metals, influence of gases,

estimation of CO, in self-rais-
ing, 191

Fluid motion, discontinuous, past
a bent plane, 94
Fluorine in mineral waters, 48
Fonzes-Diacon, M., basic sul.
phates of copper, 48
Forster, M. O., and M. Schlaepfer,
studies in the camphane
series, 10
Fowler, A., new type of series in
the band spectrum associated
with helium, 94
Francois, M., and E. Boismenu,
determination of free or com-
bined glycerin, 165
Frankland, P. F., chemical in-
dustries of Germany, 255, 266,
277, 298
Free trade. tariffs and industry, 25
Friend, J. N., and others, Text-
book of Inorganic Chemistry"
(review), 58

Fringes, interference, 275

312

Ethyl alcohol, action on disilicon
hexachloride, 11

estimation of methyl alcohol in
presence of, 191
benzoate, derivatives, rate of
saponification, 23

hydracrylate, preparation and
hydrolysis, 153
malonate and ethyl cyano •
acetate, preparation, 33
oxide, preparation of anhydrous
nickel bromide and a com-
pound with, 48
Everett and Voigt theories re-

garding origin of combination
tones, 239
Evolution, simplification of arith.
metical process of, 142
Ewart, A. J., function of chloro-
phyll, 131
Extracts derived from albuminous
substances, methods in esti-
mation of nitrogenous con-
stituents of, 191
Exudation in organs, effect of
functional activity upon, 130
Eye, transmission of infra-red
rays by media of, 236

FARADAY Society, 284

Ferment action and surface ten-
sion, 236
Ferrocyanides, volumetric estima-
mation, 286
Ferrous sulphate method for de-
termination of vanadium in
steel, 304

Fertilisers, the nitrogen of pro-
cessed, 145, 162, 169, 186
use of radio-active substances
as, 233, 242
Films, stability of liquid, 18
Filter-paper, English, 58
Findlay, A., " Practical Physical
Chemistry" (review), 167
Firth, J. B., and J. E. Myers,
"Elementary Practical Chem-
istry" (review), 47

some properties of solutions of
the boric acids in alcohol, 22
Fischer, M. H. "Oedema and
Nephritis" (review), 214
Flames, gas, 8
Fleming, J. A., instrument for the

optical delineation and pro-
jection of physical curves, 190

Functional activity, effect upon

the metabolism, blood flow,
and exudation in organs, 130

GALVANIC cell which reverses

its polarity when illuminated,
118

Gambier, block, 240
Gas flames, 8

water, and coal, separation of
the illuminants in mixed, 150,
139

Gases, effects of different, on
electron emission from glow.
ing solids, 223

experiments on

condensation

nuclei produced in, by ultra-
violet light, 239

influence on emission of elec-

trons and ions from hot
metals, 310
Gaseous combustion at high pres.
sures, 116
Gautier, A., and P. Clausmann,

fluorine in mineral waters, 48
Gay, L., F. Ducelliez, and A.

Raynaud. (See Ducelliez, F)
Gérard, M., and O. de coninck.
(See De Coninck, O.)
German kultur defined, 109

methods in commerce, I
Germany and Britain in relation
to the chemical trade, 3
chemical industries of, 255, 266,
277, 291
Germann, F. E. E., and P. H.
Guye. (See Guye, P. H.)
Gibbs adsorption formula, simple
method of deriving, 284
Gifford, Lieut.-Col. J. W., some
temperature refraction coeff-
cients of optical glass, 117
Gilmour, R., new method for the
analysis of the copper and tin
groups, 206

separation of alkaline earth
metals and the alkalis, 217
Glass analysis, rapid methods, 64

notes on, 133
research, 187

soft soda, suitable for X-ray
bulbs. 309

temperature refraction coeffi
cients of optical, 117
Glasses, coloured, of the Middle
Ages, chemical study of, 300
transmission of radiant energy
by Crookes' and other, 236
Glassware, composition of types
of some chemical, 292
Glycerin, determination of free or
combined, 168
Glycerophosphoric mono-ethers,
diagnosis of, 144
Gold, electrolytic refining of, 183,
196

Golding, J, and Elfreida C. V.
Cornish. (See Cornish, E. C.
V.)

316

cathode rays, 27

man. (See Sosman, R. B.)

protozoa in relation to the
factor limiting bacterial ac-
tivity in soil, 83
Gore-Browne, F., "Effect of the
War on Commercial En-
gagements" (review), 47
Goris, A., and C. Vischniac,
tormentol, 232
Government co-operation with in-
dustries, 100
Gray, T., and G. S. Cruikshanks,

method of separating the di-
hydroxybenzenes, 33
Griffiths, E. A., and E., coeffi-

cient of expansion of sodium,
310
Grignard, V., and C. Courtot,
benzofulvanol and
fulvene, 264
Grimbert, L., and O. Bailly,

benzo-

Hardnass, interstrain theory of,
15

Harlow, F. J., and R. S. Willows,

simple method of deriving the
Gibbs adsorption formula, 284
Hart, E., and H. B. Huselton,

cæsium alum and its pro-
perties, 49

R. N., "Leavening Agents" (re-
view), 204
Hartridge, H., and A. V. Hill,
transmission of infra-red rays
by the media of the eye, 236
Hawley, H., routine detection and
estimation of boric acid in
butter, 143
Haworth, W. N., new method of

preparing alkylated sugars, 22
Heilbron, I. M., F. J. Wilson, and

Maggie M. J. Sutherland. (See
Wilson, F. J.)
Helium, band spectrum associated
with, 310

new type of series in band
spectrum associated with, 94
Hemmerlé, R., and J. Bougault.
(See Bougault, J.)
Henderson, J. B., and L. A.
Meston, freezing - point of
some abnormal milks, 51
Hicks, W. M., orbits of a charged
particle round an electric and
magnetic nucleus, 117
Hill, A V., and H. Hartridge.
(See Hartridge, H)
Hodgson, H. H., "The

Raw

natural and synthetic, 247,
258

Hurst, J. E., micro-photography,
136

Huselton, H. B., and E. Hart.

(See Hart, E.)
Hydrate of arseniuretted hydro-

gen, 252
Hydrogen and neon, experiment
showing the difference in
width of spectrum lines, 284
hydrate of arseniuretted, 252
its

technical production and
uses, 123

chloride, action on semicarb-

159

Imperial College of Science and
Technology, 240

Indene double bond, theory of

oscillation of, 264
Indian Science Congress, 107
Indigo, catalytic reduction, 215
Industries, Government co-opera-
tion with, 100
new British, 165
Industry and chemistry, 41
and science, 180

mobilisation of, 141
tariffs and free trade, 25
Infra-red rays, transmission by

the media of the eye, 236
Ingle, H., "A Manual of Oils,

Resins, and Paints' (review),

214
Innes, J. R., and P. Phillips. (See
Phillips, P.)
Institute of Chemistry, pass list,
60, 228

professional chemists and the
war, 128

of Industry and Commerce, 31
and Science, 107
of Metals, 220

corrosion committee, 228
Institution of Chemical Techno-

logists, 202, 211, 224, 227, 236
of Petroleum Technologists, 58
Instrument for the optical de-

lineation and projection of
physical curves, 190
Involution, simplification of arith-
metical process of, 142
Iodine, blue adsorption spectrum

of, 32

permeability in, 284
oxides, reduction by platinum,
293

Isodibenzoylglucoxylose, 32
Isomerism of the oximes, 22
Itano, A., and F. H. H. Van
Suchtelen. (See Van Such-
telen, F. H. H.)

alcohol in presence of ethyl
alcohol, 191

H. C., "Discussion of Evidence
on the Solvate Theory of
Solution obtained in the
Laboratories of Johns Hop-
kins University" (review),
227

and collaborators," Absorption
Spectra of Solutions as Studied
by means of the Radio-micro-
meter" (review), 264
R., and G. H. Bryan. (See
Bryan, G. H.)
Jordan, G. F. W., some novel
laboratory experiments, 275
Jorissen, W. P., action of lead,
copper, tin, nickel, zinc, and
aluminium on water, 56, 67,
78, 91, 102
Juéry, A., dehydration and etheri-
fication of cyclohexanol and
p-methylcyclohexanol by
oxalic acid, 312

KATO, T., and J. Barcroft

(See Barcroft, I.)
Keane, C. A.,

Technical Me-
thods of Chemical Analysis "
(review), 12, 35
Keegan, P. Q., later researches on
anthocyan, 87

notes on plant chemistry, 289
Keene, H. B.. electrically heated
full radiator, 71
Keeney, R. M., D. A. Lyon, and
J. F. Cullen. (See Lyon,
D. A.)

Kenyon, J., and R. H. Pickard,
investigations on the depen-
dence of rotatory power on
chemical constitution, 11, 33
Kern, S., iron casting, 3, 152
Kew Observatory, atmospheric

electricity potential gradient
at, 1898-1912, 70
difference between the magnetic

diurnal variations on ordinary
and quiet days at, 222
Kipping, F. S., preparation of the

chlorides of silicon, 135
Kirchhoff's equation and Von

Babo's law for the latent heat
of dilution, 284
Knight, N., sandy soil of Sylvan
Beach, New York 49
Knox, W.K., nitrogen and chlorine
in rain and snow, 61

LABORATORY

experiments,

some novel, 275
ware, British, 192
Lath, measurement of Poisson's

ratio for a rectangular, 275
Lathrop, E. C., nitrogen of pro-

cessed fertilisers, 145, 162, 169,
186

Lattey, R. T., electrostatic basis
for the law of mass action in
electrolytic solutions, 135
Le Bas, G., constitution of some
nitrogen and phosphorus com.
pounds and
constitution of
elementary phosphorus, 113
Le Brazidec, M., molecular trans-

position in the phenyl cyclo-
hexane series, 36
Lead, absorption in, of y-rays
emitted by radium B and
radium C, 282

action on water, 56, 67, 78, 91,

102

atomic weight, revision of, 265
of radio-active origin, atomic
weight, 42, 50

ordinary, and lead of radio-
active origin, spectra, 95
Lecithin, constitution of glycero-
phosphoric acid of, 252
Leduc, A., determination of y
from the velocity of sound,
288

July 23, 1915

Lees,!:C. H., shapes of equi-
potential surfaces in the air
near long buildings or walls,
and their effect on measure-
ment of atmospheric potential
gradients, 310
Lembert, M. E. and T. W.
Richards. (See Richards,
T. W.)

Levi, M. G., methods of analysing
sulphur, 168

Levy, A. G., determination of
niobium in the presence of
tantalum, 191

S. I.," The Rare Earths" (re-
view), 58
Lewkowitsch,

J., "Chemical
Technology and Analysis of
Oils, Fats, and Waxes" (re-
view), 250

Licence taxes and company law,

ultraviolet, experiments on
condensation nuclei preduced
in gases by, 239

unit of candle-power in white,
166

Lindholm, F., "Extinction des
Radiations Solaires dans
l'Atmosphère Terrestre " (re-
view), 312

Li nseed rate of liberation of
hydrocyanic acid from com-
mercial, 19

Liquids, catalytic hydrogenation
of, under influence of common
metals at moderate tempera-
tures and pressures, 276
Literary intelligence, 36, 132
Lithium, separation of magnesium

from, by means of ammonium
carbonate in alcoholic solu-
tion, 305
Little, H. F. V., and others,

"Text-book of Inorganic
Chemistry" (review), 58
Lloyd, Miss D. J., osmotic

balance of skeletal muscle,
131

Locquin, R., cis-caronic acid and
derivatives, 48
Lorimer, W., steel industry op-
portunities for Britain, 88
Loring, F. H., cyclic evolution of
the chemical elements, 157,

181

mass and weight, 301
number relations amongst the
elements, 13

Louis, D. A., obituary, 251
Love, A. E. H, transmission of
electric waves over the surface
of the earth, 70

Luff, A. P., and H. C. H. Candy,
Manual of Chemistry" (re-
view), 96
Lunar diurnal magnetic variation
and its change with lunar
distance. 117

Lunge, G., "Technical Methods

of Chemical Analysis" (re.
view), 12, 35
Lyman, T., The Spectroscopy
of the Extreme Ultra-violet"
(review), 71

Lyon, D. A., R. M. Keeney, and
J. F. Cullen, "Electric Furnace
in Metallurgical Work" (re-
view), 300

MACARA, T., estimation of
CO, in self-raising flour and
baking powders, 191
McCance, A., interstrain theory of
hardness, 15
McCombie, H., and H. A. Scar-
borough, rate of saponifica-
tion of derivatives of ethyl
benzoate, 23
McCormack, H., why America
does not manufacture aniline
dyes, 75