The Chemical Gazette, 4권1846 |
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자주 나오는 단어 및 구문
acetate of lead acetic acid added æther albumen alcohol alkaline alloxanic ammonia analysis arsenic atom barytes becomes boiling carbonate of soda carbonic acid carthamine caustic cent Chem chemical chloride chromic acid colour colourless combination compound contains converted cooling copper crystalline crystals decomposed decomposition dilute dissolved distilled dried elaidic acid employed equiv evaporated excess experiments filtered fluid formed formula fused grms heated hydrate hydrochloric acid hydrogen ignited insoluble iron lime liquid magnesia mass matter mercury metallic mixed mixture muriatic acid neutral nitrate nitric acid nitrogen obtained odour oleic acid oxalic oxide oxide of lead oxygen pelopic perfectly peroxide phosphate platinum portion potash potassium powder precipitate prepared protoxide pure reaction readily residue salt saturated selenious acid separated silver small quantity solution substance sulphate sulphuretted hydrogen sulphuric acid tained temperature tion treated tube turbid urea washed weight yellow yielded zinc
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361 페이지 - A fungus is developed on a single spot of ground — sheds its seed, and dies ; — on the spot where it grew it leaves a valuable manuring of phosphoric acid and alkalies — some magnesia and a little sulphate of lime. Another fungus might undoubtedly grow on the same spot again ; but upon the death of the first, the ground becomes occupied by a vigorous crop of grass rising like a phoenix on the ashes of its predecessor.
360 페이지 - After describing these patches, with which most persons are familiar, the author states 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 agaries, or " toad-stools,
55 페이지 - Smee's battery, which I had just constructed, and after several experiments, succeeded in obtaining small sheets of silver, radiant with the hues of the shell. When seen by a single light, as that of a lamp, the play of colours is surpassingly beautiful, scarcely inferior to that of the pearl ; and where equal care was employed, the plate of silver, which was formed eight months ago, rivals in brilliancy that which came fresh from the battery a few hours since. The process by which this result is...
160 페이지 - Wood bark are said to be equal to 30 grs. of cinchona. The Indians use a decoction of small branches and buds, in want of appetite and debility of the .stomach. It is valued also as a poultice to correct ill-conditioned sores. The Polygala Senega is too well known to need description. It is much used by the Indians, who give it in cold infusion during the remission of fevers, attended with great prostration of strength ; and in diseases of the pulmonary organs. They also esteem it highly in female...
375 페이지 - ... spreads over this part of the Atlantic Ocean, and thus we see that water of tropical currents will keep its character even in high northern latitudes. Besides the southerly direction which any current flowing from the northern polar regions must take, it will, according to well-known physical laws depending upon the rotation of the earth, always take a direction towards the west, and thus be driven towards the eastern shores of the continents, while any tropical current flowing towards the north...
186 페이지 - This is mixed with a solution of muriate of lime, of 1*200 spec, grav., in the proportion of 2 parts of the former to 1 of the latter ; decomposition immediately takes place, and the whole becomes a gelatinous mass, which must be stirred until the carbonate of lime assumes the solid form. The mass is then allowed to subside, the clear solution of muriate of ammonia is drawn off, and the carbonate of lime is washed and dried.
374 페이지 - 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.
375 페이지 - 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...
291 페이지 - The results of my investigations are, — 1. That purified animal charcoal, recently proposed as an antidote in cases of poisoning with arsenic, cannot be employed with success for this purpose. 2. That pure but slightly calcined magnesia readily absorbs arsenious acid in solution, and forms with it a compound insoluble even in boiling water. 3. That in the gelatinous state it absorbs it still more rapidly. 4. That animals to which arsenic had been administered were constantly saved when sufficient...
321 페이지 - Having thus added gradually a weight of sulphuric acid equal to about 1^ time that of the bichromate, we apply a gentle lamp heat, and continue the distillation as long as the aldehydic liquid passes over. When the reaction is most energetic, white fumes are evolved, which, falling from the beak of the retort into the receiver, are so dense that they may readily be poured from the latter through a funnel into a narrownecked bottle.