Gaseous fuels for furnace heating, 29.
Gas undertakings in Great Britain, 187.
Gas, Wonders of, 413.

Gelatine not a foodstuff, 378.
German artificial silk industry, 361.
German coal by-products, 357.

German electric power stations, 201.
German potash sales, 1924-27, 175.
German potash industry, 379.
General industrial research, 379.
Glycerine, Purifying, (New Patent), 403.
Government chemist, annual report, 264.
Granites of the Scilly Isles and their rela-
tion to the Dartmoor granites, 433.

Lower carboniferous rocks of the Menaian
region, Carnarvonshire, 399.

MAGNETIC fields, 395.

Magnetic properties of single crystals of
nickel, 416.

Magnetic reluctivity relationship, 9.
Magnetometer for the measurement of the

earth's vertical magnetic intensity in,
C.G.S. measure, 364.

Manufacture of pig iron in India, 3.
Measuring layers of atoms, 139.

Measurements of mean spherical candle

power, 7.

Measurement of the electric resistance of

porous materials, 398.

Mechanism of the formation of citric and oxalic acids, 320.

Merchandise marks act, 415.

Merchant navies of the world, 93.
Metallic industries of Niagara Peninsula, 68.
Meta-tungstates, Observations on soluble,
113, 129.

Methods of calculation of activity coefficients, 122.

Mexican charcoal and industrial waste, 61. Miller's experiments and the constitution of matter, 1.

Miners' welfare national scholarship scheme, 361.

Molybdenum, The complex cyandies of, 320.

Municipal College of Technology, Manchester, 219.

Municipal trading, successful action, 92.

PARACHOR and chemical constitution,

321.

Parachor and chemical constitution, 321.
Passage of a locomotive, 430.

Painleve, the educator, 335.

P.C.R. piston ring and the packing ring tester, 401.

Petrology of the Bodmin Moor granite, 30. Pharmaceutical Society of Great Britain, Report of, 41.

Phosphoric acid (Patent), 31.

Photochemical decomposition of zinc sulphide, 204.

Photographic exhibition, 255.
Physics in the food industry, 318.
Poetry of science, 405.

Portland cement industry of Japan, 411.
Production of chemicals in Japan in 1925,

187.

Protection of aluminium against corrosion,

203.

Protection of aluminium against corrosion, 384.

Protophyta, Some aspects of present day investigations of, 225, 241, 261. Puncture-sealing compounds for pneumatic tyres, 18.

RADIATION, A note on, 296.

Relation of the magnitudes of remaining reflex shortening in two antagonistic muscles during compound stimulation,

381.

Rare gases, Luminous discharges through,

118.

Recent developments in ammonia leaching for zinc ores, 358.

Recovering waste acetic acid, 207. Reduction of copper sulphate by sodium hypophosphite, 214.

Regularities in the spectrum of ionised neon, 432.

Refractive index of quartz, 365.

Relative stability of nitrous oxide and

ammonia in the electric discharge, 363. Report of H.M. inspectors on the provision of instruction in pure chemistry in technical colleges and schools, 20, 37,

51. Resistance to a barrier in the shape of an arc of a circle, 362.

Resolution of gratings by the astigmatic eye, 354.

Responses to stimulation of the motor area of the cerebral cortex, 381. Reversed spectra of metals produced by ex

plosion under increased pressure, 359. Review of the eleventh chemical exhibition Royal Agricultural Society, 365.

SAFETY in Mines Research Board,

Annual report, 126.

Salts of alpha linolic tetrabromide, 311.
Science and building material, 236.
Science as a career, 49.

Science library of South Kensington, 413.
Scientists and coal, 254.

Scarcity of paper in the future, 201.
Second approximation to the unseen solu
tion for the motion of a viscous fluid,
416.

Selective displacement of 0.0153A in X-ray
spectral lines, 17.

Significance of the activity coefficient, 73.
Silicates, The structure of, 132.

Society of Chemical Industry, Annual meet-
ing, 57.

Solubility of hydrogen in silver, 417.
Some aspects of the chemical industry, 115.
Some aspects of the present-day investiga-

tions of Protophyta, 225, 241, 261.
Some new metallo-organic oxonium salts, 4.
Some reflections on the properties of the

element of atomic number 87 (dvi-
caesium, etc.), 224, 310.

Some remarks on the colloid theory of
cements, 406.

South African legislation in regard to safety
and health in mining, 285.
Specific gravities of minerals, 319.
Spectral analysis of Ca, Sr, etc., 55.
Spectrophotometric observations on the

growth of oxide films on iron, nickel
and copper, 417.

Spectrum of carbon-arcs in air at high cur-
rent densities, 364.

Stannous chloride on silver mirror forma-
tion, Action of, 197.

Starch, Recent advances in our knowledge
of, 136.

Stellar energy, relativity, gravity, æther,

photo-electric effect, 389, 421.
Stratigraphical distribution of the Corn-

brash: I. The South-Western area, 365.
Stratigraphy and geological structure of the
Cambrian area of Comley (Shropshire),

141.

Structure of an atom of nitrogen, 153, 166,
341.

Structure of the smoke particles from a
cadmium arc, 337.

Structure of surface films, 398.
Structural relationship in the carbohydrate

group, 134.

Studies of dynamic isomerism, 284.
Studies of dynamic isomerism, 382.
Studies of solid gas equilibria, Part I, 363.
Study of the catalysts by nickel of the union
of hydrogen and oxygen by a new
method, 363.

Sugar output of Europe, 416.
Sulphuric acid (New Patent), 307.
Synthetic rubber, Is successful manufac-
ture in sight?, 377.

Synthesis of red dispersoidal solutions of
gold by means of aqueous extracts from
fresh leaves of plants, 204.

Synthesis of 4-hydroxy-3-methoxystyr n-
butyl ketone, 252.

System of magnesium-cadmium, 385.

oxygen spectrum, 9.

Wave-length measurements in the arc and
spark spectra of zirconium, 330.
Wave-length measurements in the arc spec-
trum of scandium, 282.
Weighing London fogs, 429.

Wholesale prices in France, Belgium, and
Germany, 94.

Wholesale prices in August, 203.
Wholesale prices in September, 268.

Willemite, South African occurrences of,
320.

Wireless transmission and the upper atmo-
pshere, 72.

Witherite, History or, 309.

Woodhouse, James, 1770-1809, 187.
Wonders of gas, 413.

World's oldest refrigeration society, 42.

X-RAYS and the chemical molecule, 141.

X-ray Isochromates of copper taken in
different directions, 26.

X-ray spectral lines, 17.

X-ray spectral lines, addendum, 183.
X-ray spectroscopic part, 230.
X-ray study of the heat motions of the
atoms in a Rock-salt crystal, 397.

ZINC chloride in concentrated solution,
the activity of, 10.

Barr, Guy, M.A., D.Sc. :

Construction of Wave-Length Scales for
Spectrograms, 285.

Bather, Dr. F. A., M.A., F.R.S.:

The Stratigraphy and Geological Struc-
ture of the Cambrian Area of Comley
(Shropshire), 141.

Bond, W. N., M.A., D.Sc. :

The Theory of Liquid Flow through
Cones, 337.

Boswell, P. G. H.:

Distribution of Purple Zircon in British
Sedimentary Rocks, 30.

Bowmaker, R. J. C., B.Sc., and J. D.
Gauwood, M.Sc. :

The Detection of Selenium in Decolourised
Bottle Glass, 322.

Boyd, D. R., and Ladhams, D. E. :
The Reaction between Diaryloxyiso-
propyl Alcohols and Phosphorus Oxy-
chloride in the Presence of Pyridine,
382.

Blackett, M. S., and Hudson, E. P. :
The Elasticity of the Collisions of Alpha
Particles with Hydrogen Nuclei, 364.
Blackman, Philip :

ANew Method for Measuring Vapour
Densities, 97.

Bragg, Sir William, K.B.E., D.Sc., F.R.S.:
Tyndall's Experiments on Magne-Crys-

tallic Action, 423.

The Origin of Speech, 336.

Bragg, W. L., O.B.E., M.A., F.R.S.:
The Structure of Silicates, 132.
Brame, Prof. J. S. S., and Hunter, T. G.:
Composition of Cracked Distillates, 382.
Brown, T. Graham, F.R.S.:

The Relationship of the Magnitudes of
the Remaining Reflex Shortening in
two Antagonistic Muscles during Com-
pound Stimulation, 381.

Bucknall, W. R., and Wardlaw, W.:
Complex Cyanides of Molybdenum, 320.
Burchnell, J. L., and Chaundy, D. W. :
Commutative Ordinary Differential

Coode-Adams, R. C.:

The Refractive Index of Quartz, 365. Cook, W. T.,B .Sc., A.I.C., and Jones, W. R. D., M.Sc.;

The Copper-Magnesium Alloys, 270. Cooper, Sybil, and D. Denny-Brown : Responses to Stimulation of the Motor Area of the Cerebral Cortex, 381. Chapman, A. Chaston, F.I.C., F.R.S.:

The Oil of Centrophorus Granulosus, 273. Chapman, E., Perkins, A. G., and Robinson, R.:

The Colouring Matters of Carajura, 321. Craig, E. H., and Cunningham, B. A., F.R.S.:

Jet and Jetonised Material, 105. Crow, T. B. :

Cohesion at Soldered Surfaces, 383. Davidson, Jehiel :

Effect of Hydrogen-ion Concentration on the Absorption of Phosphorus and Potassium by Wheat Seedlings, 385. Dobroserdov, D. K. (Odessa): Some Reflections on the Properties of the Element of Atomic Number 87, 310. Dolejsek, V., and Heyrovsky, J. :

The Occurrence of Dvi-Manganese in Manganese Compounds, 229.

Fowles, G., M.Sc., A.I.C.:

The History of Witherite, 309. Fox, C. J. J., and Hall, L.:

Some Recent Developments in the Cellulose Industries, 251.

Foxton, F., and Shutt, W. J.:

Activity of Zinc Chloride in Concentrated Solution, 10.

Fritsch, F. E., D.Sc., Ph.D.;

Some Aspects of Present-day Investigations of Protophyta, 225.

Fukuda, Mitsuharu :

Reversed Spectra of Metals Produced by Explosion under Increased Pressure,

359.

Garner, F. B., and Sugden, S.:

The Parachor and Chemical Constitution, 321.

Gayler, Marie, L. V., D.Sc. :

The Under-Cooling of some Aluminium Alloys, 269.

Ghosh, Dr. P. K. :

On Biotite Bearing Greenstones, 320. Petrology of the Bodmin Moor Granite,

30.

Giauque, W. F.:

Low Temperature Magnetic Susceptibility Data of Gadolinium Sulphate,

203.

Gibson, G. S., and Johnson, J. D. A.: 10-Chloro-5: 10-Dihydrophenarsazine and its Derivatives, 284.

Glenday, Vincent G. M. A., and Parkinson John, M.A.:

Kateruk Series and Associated Rocks (Kenya), 76.

Goldsborough, G. R. :

Tides in Oceans on a Rotating Globe, 430. Greenly, Dr. Edward :

The Lower Carboniferous Rocks of the Menaian Region of Carnorvonshire, 399. Griffiths, Ezer, D.Sc., F.R.S.:

A Calorimeter for Determination of the Heat Development by Fruit, 432. Grindley, R., and Pyman, F. L.: Condensation of Glyoxalines with Form aldehyde, 381.

Gwyer, A. G. C., B.Sc., Ph.D., and Phillips, W. H. L., B.A., A.I.C.:

The Constitution of Alloys of Aluminium with Silicon and Iron, 269. Hadnert, Peter, and Sweeney, W. T.: Thermal Expansion of Graphite, 13. Hallimond. A. F.:

Atomic Volume Relations in a Certain Isomorphous Series, 29.