The Chemical Gazette, Band 11843 |
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Seite 8
... whole of the substance held in solution is precipitated , tincture of iodine no longer gives rise to any colour ; if , again , it be redissolved in sulphuric acid , it may be precipitated by tincture of iodine with the blue colour ...
... whole of the substance held in solution is precipitated , tincture of iodine no longer gives rise to any colour ; if , again , it be redissolved in sulphuric acid , it may be precipitated by tincture of iodine with the blue colour ...
Seite 11
... whole of the zinc is precipitated as a yellow powder , which is Gn S , As2 S5 . If , how- ever , the arsenic acid be first reduced to arsenious acid by means of sulphurous acid , then no sulphuret of zinc is precipitated , but only ...
... whole of the zinc is precipitated as a yellow powder , which is Gn S , As2 S5 . If , how- ever , the arsenic acid be first reduced to arsenious acid by means of sulphurous acid , then no sulphuret of zinc is precipitated , but only ...
Seite 12
... whole evaporated , and the residue gently heated , so that they remain perfectly insoluble when the mass is treated with water . The oxides are washed and dried , and then being placed in a tube with a bulb , are reduced by means of ...
... whole evaporated , and the residue gently heated , so that they remain perfectly insoluble when the mass is treated with water . The oxides are washed and dried , and then being placed in a tube with a bulb , are reduced by means of ...
Seite 19
... whole province of organic chemistry . We are indebted to him for the present predominating principle in all organic researches , viz . to subject a body to a series of changes , and to ground its composition on their ascertained ...
... whole province of organic chemistry . We are indebted to him for the present predominating principle in all organic researches , viz . to subject a body to a series of changes , and to ground its composition on their ascertained ...
Seite 24
... whole placed in a covered crucible , which is slowly warmed , in order to drive off the water ; as soon as this is effected it is heated red hot . The heat must be so regulated that the mass sinters together without fusing . It is then ...
... whole placed in a covered crucible , which is slowly warmed , in order to drive off the water ; as soon as this is effected it is heated red hot . The heat must be so regulated that the mass sinters together without fusing . It is then ...
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Häufige Begriffe und Wortgruppen
acetic acid action added æther affords alcohol alkali ammonia analysis antimony aqueous arsenic atoms barytes becomes blue boiling brown carbonate of soda carbonic acid cent Chem chemical CHEMISTRY chloride chromic acid cold colour colourless combination compound concentrated consists contains converted cooling copper crystalline crystals cyanide decomposed decomposition deposited dilute dissolved distilled dried easily employed evaporated excess experiments extract Fahr filtered formed gallic acid gelatine glass grms heat hydrate hydrochloric acid hydrogen insoluble iodic acid iodide iodine iron lime liquid mass mercury metallic method mixed mixture muriatic acid neutral nitrate nitric acid nitrogen obtained odour oxalic oxide oxygen peroxide Pharm phosphate platinum portion potassium powder precipitate prepared produced protoxide pure residue resin salt saturated separated silver small quantity smell solanine soluble solution substance sugar sulphate sulphuretted hydrogen sulphuric acid temperature tion treated tube vapours vessel vinegar weight yellow zinc
Beliebte Passagen
Seite 232 - Some cause there must be, which would explain how the practice has become a necessary of life to whole nations. But it is surely still more remarkable, that the beneficial effects of both plants on the health must be ascribed to one and the same substance, the presence of which in two vegetables, belonging to different natural families, and the produce of different quarters of the globe, could hardly have presented itself to the boldest imagination.
Seite 555 - TREATISE ON FOOD AND DIET: With Observations on the Dietetical Regimen suited for Disordered States of the Digestive Organs ; and an Account of the Dietaries of some of the principal Metropolitan and other Establishments for Paupers, Lunatics, Criminals, Children, the Sick, &c. By JON. PEREIRA, MDFRS & LS Author of
Seite 232 - We shall never certainly be able to discover how men were led to the use of the hot infusion of the leaves of a certain shrub (tea), or of a decoction of certain roasted seeds (coffee). Some cause there must be which would explain how the practice has become a necessary of life to whole nations.
Seite 377 - ... the wound is charred, soon after which the liquid begins to ooze out. A small gutter is cut in the wood to conduct the liquid into a vessel placed to receive it. The average produce of the best trees during the season, is said to be sometimes 40 gallons.
Seite 256 - The mixture was placed in a watch-glass, and spread out so as to expose a large surface to the air; the watch-glass was placed on a support in a copper vessel (the air contained in this vessel could be brought to any required temperature). The experiment being thus disposed, the vessel was heated, and by the time that the air in the interior arrived at 248° Fah. a change began to take place in the mixture, and at 266° Fah.
Seite 503 - ... improvements in the manufacture of glass, for the purpose of producing glass which may be used for the purposes to which plate glass and window glass are usually applied. June 4 ; six months. 'Edmund Tuck, of the Haymarket, St. James's, Westminster, silversmith, for certain improvements in the covering or plating with silver various metals and metallic alloys.
Seite 223 - This invention consists in combining chlorine in the state of gas with the vapour of mercury or quicksilver, in order to produce calomel and corrosive sublimate.
Seite 164 - I mix with the bones, bone ash, or bone dust, or, with apatite or phosphorite or any other substance containing phosphoric acid, a quantity of sulphuric acid, just sufficient to set free as much phosphoric acid as will hold in solution the undecomposed phosphate of lime...
Seite 560 - I apply heat to the vessel in which the spirit is contained, so as to drive the spirit over in vapour, •which passes along the pipes into the successive vessels, and through the liquid contained in them. The temperature of the liquids contained in the several vessels may thus be kept above the condensing point of the vapour, either by the heat of the vapour itself or by external heat applied to the several vessels. The vapour from the last of these vessels is conducted to a condenser and condensed...
Seite 473 - Mr. Nash had a bonfire of tar barrels lighted on the roof of Cowes castle. Another advantage is stated to be, the facility of repair which the composition offers, as if a leak occurs, it can be seared and rendered perfectly water-tight, by passing a hot iron over it ; and when taken up, the mixture can be remelted and used again. The author proposes to obviate the disadvantage of the present weight of these roofs, by building single brick walls at given distances, to carry slates, upon which the...