the chemist; a monthly journal of chemical philosophy and of chemistry applied to the arts, manufactures, agriculture, and medicine, and record of pharmacy. |
Vanuit het boek
Resultaten 1-5 van 86
Pagina 3
... filtered liquid . This solution retains the potassa and caffeïne . The latter may be extracted by evaporating to dryness , washing the residue with cold alcohol , then dissolving the caffeïne in boiling alcohol , which , after filtration ...
... filtered liquid . This solution retains the potassa and caffeïne . The latter may be extracted by evaporating to dryness , washing the residue with cold alcohol , then dissolving the caffeïne in boiling alcohol , which , after filtration ...
Pagina 13
... filtration . It was by operating thus that we were ena- bled to estimate precisely the small quantity of nitrate of ... filtered . It may be poured into bottles , which must be perfectly fitted and corked immediately . After having done ...
... filtration . It was by operating thus that we were ena- bled to estimate precisely the small quantity of nitrate of ... filtered . It may be poured into bottles , which must be perfectly fitted and corked immediately . After having done ...
Pagina 14
... filtration is evaporated to dryness , and the quantity of bicarbonate of soda or potassa originally held in solution in the water is appreciated ; from these results we deter- mine by calculation the carbonate that this salt produced ...
... filtration is evaporated to dryness , and the quantity of bicarbonate of soda or potassa originally held in solution in the water is appreciated ; from these results we deter- mine by calculation the carbonate that this salt produced ...
Pagina 15
... filtered from the sulphuret of copper was boiled in order to expel the excess of gas , and the oxide of chromium was precipi- tated with ammonia . When completely se- parated by long boiling , it was collected in a filter , ignited and ...
... filtered from the sulphuret of copper was boiled in order to expel the excess of gas , and the oxide of chromium was precipi- tated with ammonia . When completely se- parated by long boiling , it was collected in a filter , ignited and ...
Pagina 17
... filtered . The filtrate is carefully neutra lised with pure nitric acid , and precipitated with acetate of lead , adding sulphurous and dilute sulphuric acids until the resulting precipitate is white . Filter and boil with caustic ...
... filtered . The filtrate is carefully neutra lised with pure nitric acid , and precipitated with acetate of lead , adding sulphurous and dilute sulphuric acids until the resulting precipitate is white . Filter and boil with caustic ...
Veelvoorkomende woorden en zinsdelen
acetic action albumen alcohol alkaline alloy alumina ammonia analysis animal appears baryta battery bodies boiling carbonate of lime carbonic acid cent charcoal chemical chemists chloric acid chloride chloride of sodium chloroform color combination composition compound contained copper crystallised crystals decomposed decomposition 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 manganese manufacture manure means ment metallic mineral mixed mixture nitrate nitric acid nitrogen obtained odor operation oxide oxide of iron oxygen phosphate phosphoric 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
Populaire passages
Pagina 354 - 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.
Pagina 354 - 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.
Pagina 319 - ... now become hard and horny, we obtain an equal weight of the most aromatic soup, of such strength as cannot be obtained, even by boiling for hours, from a piece of flesh. When mixed with salt and the other usual additions, by which soup is usually seasoned, and tinged somewhat darker by means of roasted onions or burnt sugar, it forms the very best soup which can in any way be obtained from 1 Ib. of flesh.
Pagina 380 - CYCLOPEDIA OF AGRICULTURE, PRACTICAL AND SCIENTIFIC; in which the Theory, the Art, and the Business of Farming, m all their departments, are thoroughly and practically treated.
Pagina 75 - ... put the mucky liquid to stand, so that they may, after it has rested for a day or two, skim the fluid from the solid particles of filth, pollution, and disease.
Pagina 345 - ... and liberates the oxygen in its gaseous state to sustain the healthy functions of the animal life, at the same time that it feeds on the rejected matter which has fulfilled its purposes in the nourishment of the fish and snail, and preserves the water constantly in a clean and healthy condition.
Pagina 202 - 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.
Pagina 354 - ... 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.
Pagina 354 - 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...
Pagina 354 - Whilst formerly the greatest mental energies strove at universal knowledge, and that knowledge was confined to the few, now they are directed on specialities, and in these, again, even to the minutest points...