Elements of Chemistry: In which the Recent Discoveries in the Science are Included and Its Doctrines Familiarly Explained : Illustrated by Numerous Engravings and Designed for the Use of Schools and Academies

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Pratt, Woodford & Company, 1845 - 420 ページ
 

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70 ページ - The conception of a force acting directly as the quantity of matter, and inversely as the square of the distance...
2 ページ - BBOWN, of the said district, hath deposited in this office the title of a book, the right whereof he claims as author, in the words following, to wit : " Sertorius : or, the Roman Patriot.
2 ページ - ... an act for the encouragement of learning, by securing the copies of Maps, Charts, and Books, to the authors and proprietors of such copies during the times therein mentioned,' and extending the benefits thereof to the arts of designing, engraving, and etching historical and other prints.
421 ページ - ... the salt. This knowledge, on the contrary, is obtained directly by means of the scale of chemical equivalents. For example, on pushing up the slide, until 100 marked upon it is in a line with the name sulphate of potassa on the fixed part of the scale, the numbers opposite to the terms sulphuric acid and potassa, will give the precise quantity of each contained in 100 parts of the compound. In the original scale of Dr Wollaston...
178 ページ - The crowd from all sides soon collected to the number of several hundreds, some crying out for a husband, others for a parent or a son, and all deeply affected with an admixture of horror, anxiety, and grief.
214 ページ - If much finer, i! does not retain sufficient heat at the lower part of the coil to keep up the evaporation of the alcohol from the wick. The coiling of the wire, and the adjustment of the wick, are the most difficult parts of the construction. The coil A. fig.
337 ページ - Of this hydrated peroxide, forty-nine parts contain forty of the anhydrous peroxide of iron. But the most accurate mode of determining its quantity is by expelling the water by a red heat. This operation, however, should be done with care; since any adhering particles of paper, or other combustible matter, would bring the iron into the state of black oxide, a change which is known to have occurred by the iron being attracted by a magnet. To procure the alumina...
192 ページ - ... one hundred parts of water, and sprinkle this mixture over the field before the plough. In a few seconds, the free acids unite with the bases contained in the earth, and a neutral salt is formed in a very fine state of division.
340 ページ - ... ammoniaco-magnesian phosphate. The excess of phosphoric acid is afterwards removed by the acetate of lead, and that of lead by sulphuretted hydrogen. The acetate of the alkali is then brought to dryness, ignited, and by the addition of sulphate of ammonia is converted into a sulphate. , In the preceding account, several operations have been alluded to, which, from their importance, deserve more particular mention. The process of filtering, for example, is one on which the success of analyses...
337 ページ - But- the most accurate mode of determining its quantity is by expelling lhe water by a red heat. This operation, however, should be done with care; since any adhering particles of paper, or other combustible matter, would bring the iron into the state of black oxide, a change which is known to have occurred by the iron being attracted by a magnet. To procure the alumina, the liquid in which it is dissolved is boiled with...

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