The Chemical Gazette, Or, Journal of Practical Chemistry, in All Its Applications to Pharmacy, Arts, and Manufactures, Volume 4Richard and John E. Taylor, 1846 |
Overige edities - Alles bekijken
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The Chemical Gazette, Or, Journal of Practical Chemistry, in All ..., Volume 3 Volledige weergave - 1845 |
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Veelvoorkomende woorden en zinsdelen
acetate of lead acetic acid added æther alcohol alkaline alloxanic ammonia analysis atom barytes becomes bibasic boiling carbonate of soda carbonic acid carthamine caustic cent Chem chemical chloride chloride of sodium chromic acid colourless compound contains cooling copper crystalline crystals decomposed decomposition dilute dissolved distilled dried employed equiv evaporated excess experiments extract filtered fluid formed formula fused grms heated hydrate hydrochloric acid hydrogen insoluble iron lime liquid magnesia mass mercury metallic mixed mixture muriatic acid neutral nitrate nitric acid nitrogen obtained odour oleic acid oxalic oxalic acid oxide oxide of lead oxygen perfectly peroxide phosphate platinum portion potash potassium powder precipitate prepared produced protochloride protoxide pure reaction readily residue ruthenium salt saturated selenious acid separated silver small quantity solution substance sugar sulphate sulphuretted hydrogen sulphuric acid tained temperature tion treated tube turbid urea washed weight yellow yielded zinc
Populaire passages
Pagina 60 - ... and this configuration gives rise to the glowing tints of the shell. The next step is to obtain an exact impression of this surface upon some good conductor of electricity. This we are enabled to do by means of fusible metal, if proper precautions are employed in taking the impression. I pursue exactly the same method as in taking the copy of a medal. After fusing the metal, I pour it upon oiled paper, and when the...
Pagina 386 - A description of these patches, with which most persons are familiar, was given ; and it was stated that the grass of which such rings are formed is always the first to vegetate in the spring, and keeps the lead of the ordinary grass of the pastures till the period of cutting. If the grass of these fairy-rings be examined in the spring and early summer, it will be found to conceal a number of agarics or " toad-stools
Pagina 410 - N. lat. 39° 39' and W. long. 55° 16', its former height of 36'5. From thence it decreases slowly towards the north-east, and sea water, at a distance of sixty to eighty miles from the western shores of England, contains only 35'7 parts of solid substances ; and the same quantity of salt is found all over the north-eastern part of the Atlantic as far to the north as Iceland, always at such a distance from the land that the influence of fresh water from the land is avoided.
Pagina 432 - When the mixture has cooled, place 100 grains of fine cotton wool in a Wedgewood mortar, pour the acid over it, and with a glass rod imbue the cotton as quickly as possible with the acid. As soon as the cotton is completely saturated, pour off the acid, and with the aid of a pestle quickly squeeze out as much of the acid from the cotton as is possible.
Pagina 411 - Europe, which are surrounded by warm water by a branch of a tropical current, produce a mild and moist climate. The water of the different seas is much more uniform in its composition than is generally believed. In that respect my analyses agree with the newer analyses of atmospheric air in showing that the differences are very slight indeed. Sea water may contain more or less salt ; from a very small quantity, as in the interior part of the Baltic, to an amount of...
Pagina 95 - When placed in water at 110°, no effect is produced upon it, except that it receives the impression of the nail more readily ; but when the temperature is raised to 145° or upwards, it gradually becomes so soft and pliant, as to be capable of being moulded into any form, or of being rolled out into long pieces or flat plates. When in the soft state, it possesses all the elasticity of common India rubber, but it does not retain this property long.
Pagina 81 - ... squeeze out some of the secretion, which is fluid in the recent state, and mix it with, it is believed, the dried blood of the animal ; this compound, which presents the same physical characters as true musk, they put into small sacs made of pieces of the skin cut off from other parts of the animal's body, and prepared with the usual ingenuity of this people, so much so, indeed, as almost to defy detection with the naked eye. The method hitherto adopted for detecting this sophistication, has...
Pagina 59 - It is well known to those who are conversant with optical phenomena, that the brilliant play of prismatic colours exhibited by mother-of-pearl is due to the structure of the surface, provided the shell is cut and polished in a particular manner. This interesting fact was announced to the scientific world in 1829 by the discoverer, Dr Brewster, who successfully transferred, by pressure, the splendid tints of the pearl to black wax, fusible metal, balsam of tolu, lead, tin, and various other substances.
Pagina 354 - The niobic acid is then completely separated on boiling from the chloride of niobium, and also the pelopic acid from the chloride of pelopium ; but tantalic acid does not separate quite so completely from the chloride of tantalium. Chloride of tantalium, heated with a solution of hydrate of potash, is partly dissolved ; but a solution of carbonate of potash does not dissolve any tantalic acid even on boiling. Chloride of pelopium is dissolved in large quantity by solution of caustic potash, and even...
Pagina 411 - The circulation must on that account be such, that a part of the vapor which rises in tropical zones will be condensed in polar regions, and, in the form of polar currents, flow back again to warmer climates. Although my analyses are only made on water from the ocean between Europe and America, yet little doubt can be entertained that also that part of the ocean which separates America from Asia is in a similar condition ; and that currents flowing from the poles are the rule, and currents flowing...