The Chemist: A Monthly Journal of Chemical and Physical Science..., 1. kötet1850 |
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1 - 5 találat összesen 100 találatból.
6. oldal
... cause of the special effects of coffee does not reside in the agreeable , diffusible aroma , it cannot be doubted , at least , that this property has the greatest influence on the commercial value ; for this value is fixed according to ...
... cause of the special effects of coffee does not reside in the agreeable , diffusible aroma , it cannot be doubted , at least , that this property has the greatest influence on the commercial value ; for this value is fixed according to ...
11. oldal
... cause these proportions to be considered as giving only a rough ap- proximation to their composition . However , they correspond very well with the idea of its composition formed on looking at it , and are interesting from the ...
... cause these proportions to be considered as giving only a rough ap- proximation to their composition . However , they correspond very well with the idea of its composition formed on looking at it , and are interesting from the ...
28. oldal
... cause of this vigorous development may be attributed CARBON ON WEEVIL . * In this last experiment the plant attained ... causing their absolute death . I am now occupied with this . It was also important to determine whe- ther or not the ...
... cause of this vigorous development may be attributed CARBON ON WEEVIL . * In this last experiment the plant attained ... causing their absolute death . I am now occupied with this . It was also important to determine whe- ther or not the ...
31. oldal
... causes for impure air ; they are all of man's production . It is to be hoped that when the great Sorrow is past , the great Evils will not be forgotten . House - ventilation , combining as it does with the extensive subject of ...
... causes for impure air ; they are all of man's production . It is to be hoped that when the great Sorrow is past , the great Evils will not be forgotten . House - ventilation , combining as it does with the extensive subject of ...
32. oldal
... cause that the public has so long been misled into a belief that our hospitals , being perfect and re- quiring no reformation cr change , it is quite needless to bestow any attention on them , considering it utterly impossible that they ...
... cause that the public has so long been misled into a belief that our hospitals , being perfect and re- quiring no reformation cr change , it is quite needless to bestow any attention on them , considering it utterly impossible that they ...
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acetate action albumen alcohol alkali alloy alumina ammonia analysis animal appears baryta battery bodies boiling carbonate of lime carbonic acid cent charcoal chemical chemists chloride chloride of sodium chloroform chromic acid color combination composition compound contained copper crystallised crystals decomposed decomposition dilute disengagement dissolved distilled dried effects eggs electricity employed ether evaporation experiments extract fatty matter filtered fused give glass gold grammes heat humus hydrochloric acid hydrogen insoluble iodine liquid liquor magnesia manufacture manure means ment metallic mineral mixed mixture nitrate nitric acid nitrogen obtained odor operation oxide oxide of iron oxygen phosphate phosphoric acid plant platinum portion potassa potassium precipitate prepared present produced proportion quinquina residue salt santonine silica silver small quantity soda soluble solution starch substances sugar sulphate sulphuret sulphuric acid surface tained temperature tion tube vegetable vessel washed whilst yellow zinc
Népszerű szakaszok
352. oldal - THE EXHIBITION of 1851 is to give us a true test and a living picture of the point of development at which the whole of mankind has arrived in this great task, and a new starting point from which all nations will be able to direct their further exertions.
352. oldal - So man is approaching a more complete fulfilment of that great and sacred mission which he has to perform in this world. His reason being created after the image of God, he has to use it to discover the laws by which the Almighty governs His creation, and, by making these laws his standard of action, to conquer nature to his use ; himself a divine instrument.
352. oldal - ... we are living at a period of most wonderful transition, which tends rapidly to the accomplishment of that great end to which, indeed, all history points — the realization of the unity of mankind. Not a unity which breaks down the limits, and levels the peculiar characteristics of the different nations of the earth, but rather a unity the result and product of those very national...
352. oldal - Not a unity which breaks down the limits, and levels the peculiar characteristics of the different nations of the earth, but rather a unity the result and product of those very national varieties and antagonistic qualities. The distances which separated the different nations and parts of the globe are...
87. oldal - OF CHEMISTRY ; Including the most Recent Discoveries and Applications of the Science to Medicine and Pharmacy, and to the Arts. By ROBERT KANE, MDMRIA, Professor of Natural Philosophy to the Royal Dublin Society.
200. oldal - It was further shown that chemical decompositions may be produced by liquid diffusion ; the constituents of a double salt of so much stability as common alum being separated, and the sulphate of potash diffusing in the largest proportion. In fact the diffusive force is one of great energy, and quite as capable of breaking up compounds as the unequal volatility of their constituents.
67. oldal - ... at a high temperature, and recasting several times to give a great many tints, varying from blue to pink, red, opaque yellow, and green. Charcoal in excess in a mixture of silica-alkaline glass gives a yellow colour, which is not so bright as the yellow from silver, — and this yellow colour may be turned to a dark red by a second fire. The author is disposed to refer these chromatic changes to some modifications of the composing particles rather than to any chemical changes in the materials...
418. oldal - It is now to be once more drawn off, and in a dry stoppered bottle mixed with a little powdered peroxide of manganese, with which it is gently agitated, and left in contact until the odour of sulphurous acid is entirely...
201. oldal - ... as 2 to 3. Hydrate of potash and sulphate of magnesia were less fully examined, but the first presented sensibly double the diffusibility of sulphate of potash, and four times the diffusibility of the sulphate of magnesia. If these times are all squared, the following remarkable ratios are obtained for the densities of the...
137. oldal - The magnetic needle was then forced back, by pins applied upon opposite sides of its two extremities, to its natural position when uninfluenced by a current ; after which, contact being broken at G or E, it was deflected strongly in the opposite direction ; thus showing, in accordance with the chemical effects...