Chemical News and Journal of Physical Science, Tom 104Chemical news office., 1911 |
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Strona 9
... described in detail . The gradual improvements in the construction of these , in the methods of lagging , are described , and the amount of energy required to reach a given temperature is tabu- lated for furnaces of very different ...
... described in detail . The gradual improvements in the construction of these , in the methods of lagging , are described , and the amount of energy required to reach a given temperature is tabu- lated for furnaces of very different ...
Strona 10
... described the colour of an image of the star is compared with that of a standard lamp whose tint can be varied . The pyrometer is standardised by reference to an electric furnace , an arc ( 3500 ° C. ) and the sun ( 6500 ° C. ) . In the ...
... described the colour of an image of the star is compared with that of a standard lamp whose tint can be varied . The pyrometer is standardised by reference to an electric furnace , an arc ( 3500 ° C. ) and the sun ( 6500 ° C. ) . In the ...
Strona 12
... described by Vigouroux , Hempel , and v . Haasey in physical properties , e.g. , in colour and specific gravity . It turns brown when heated . Luminosity of Phosphorus . - L . Marino and C. Porlezza . The authors describe an apparatus ...
... described by Vigouroux , Hempel , and v . Haasey in physical properties , e.g. , in colour and specific gravity . It turns brown when heated . Luminosity of Phosphorus . - L . Marino and C. Porlezza . The authors describe an apparatus ...
Strona 16
... described under the name of poro- meter is similar in principle to that devised in 1873 by N. J. C. Müller , but differs from it completely in con- struction . By a simple arrangement a current of air is drawn through the stomata of a ...
... described under the name of poro- meter is similar in principle to that devised in 1873 by N. J. C. Müller , but differs from it completely in con- struction . By a simple arrangement a current of air is drawn through the stomata of a ...
Strona 21
... described . These compounds are very easily obtained by heating together phthalic anhydride and the corresponding hydrazine ; the reaction which occurs may be formulated thus : - CO.O C6H4 CO.O CO + H2N • NHR = | CoH , > C : N • NHR + ...
... described . These compounds are very easily obtained by heating together phthalic anhydride and the corresponding hydrazine ; the reaction which occurs may be formulated thus : - CO.O C6H4 CO.O CO + H2N • NHR = | CoH , > C : N • NHR + ...
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Popularne fragmenty
Strona 135 - FELKIN, HM— Technical Education in a Saxon Town. Published for the City and Guilds of London Institute for the Advancement of Technical Education.
Strona 97 - To give a stronger impulse and a more systematic direction to scientific inquiry, — to promote the intercourse of those who cultivate Science in different parts of the British Empire, with one another and with foreign philosophers, — to obtain ft more general attention to the objects of Science, and a removal of any disadvantages of a public kind which impede its progress.
Strona 219 - Bismuth . . Boron . . . Bromine . . Cadmium Caesium . . Calcium . . Carbon . . Cerium . . Chlorine . . Chromium Cobalt . . Columbium . Copper . . Dysprosium . Erbium...
Strona 104 - I often say that when you can measure what you are speaking about and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind...
Strona 37 - ... from the nature of the human mind, time is necessary for the full comprehension and perfection of great ideas: and that the highest and most wonderful truths, though communicated to the world once for all by inspired teachers could not be comprehended all at once...
Strona 255 - It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
Strona 132 - Science (B.Sc.) and Doctor of Science (D.Sc.). Candidates for Degrees in Science, if not graduates (by examination) in Arts in one of the Universities of the United Kingdom or in a Colonial or Foreign University recognised for the purpose by the University Court, must pass a preliminary examination in (i) English ; (2) Latin, Greek, French, or German ; (3) Mathematics; (4) One of ' the languages Latin, Greek, French, German, Italian, not already taken under (2), or Dynamics. In the case of a student...
Strona 99 - After consulting some of the most eminent chemical philosophers in this country, it has been judged most proper to suggest a name founded upon one of its obvious and characteristic properties— its colour, and to call it chlorine or chloric gas. " Should it hereafter be discovered to be compound, and even to contain oxygen, this name can imply no error, and cannot necessarily require a change.
Strona 219 - Rhodium . . Rubidium Ruthenium Samarium . . Scandium . . Selenium . . Silicon Silver Sodium Strontium . . Sulphur . . Tantalum . . Tellurium . . Terbium . . Thallium . . Thorium . . Thulium . . Tin.. Titanium . . Tungsten . . Uranium . . Vanadium . . Xenon Ytterbium Yttrium . . Zinc Zirconium . . Mo Nd Ne Ni N Os O Pd P Pt K Pr Ra Rn Re Rh Rb Ru Sm Sc Se Si Ag Na Sr...