The Chemist: A Monthly Journal of Chemical Philosophy, Том 21851 |
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Сторінка 10
... lead us , as may be perceived , to regard fishes ' eggs as contain- ing the same elements as those of birds . The principles which constitute the eggs of these two classes of animals vary , it is true , in their relative proportion ...
... lead us , as may be perceived , to regard fishes ' eggs as contain- ing the same elements as those of birds . The principles which constitute the eggs of these two classes of animals vary , it is true , in their relative proportion ...
Сторінка 11
... lead us to infer , the black smoke penetrates the clay and thus blackens it . The author , however , showed that this smoke acted chemically , by preventing the oxidation of the iron , and thus the change from the dark color of the clay ...
... lead us to infer , the black smoke penetrates the clay and thus blackens it . The author , however , showed that this smoke acted chemically , by preventing the oxidation of the iron , and thus the change from the dark color of the clay ...
Сторінка 20
... LEAD AND SULPHUROUS ACID AS PU- RIFYING AGENTS . BY DR . SCOFFERN . ON the southern coast of Spain , in a region limited by Almeria on the east and Malaga on the west , bounded on the north by mountain ranges and on the south by the ...
... LEAD AND SULPHUROUS ACID AS PU- RIFYING AGENTS . BY DR . SCOFFERN . ON the southern coast of Spain , in a region limited by Almeria on the east and Malaga on the west , bounded on the north by mountain ranges and on the south by the ...
Сторінка 21
... lead employed : this fear , too , practice demonstrates to be en- tirely without foundation , for not only is the sulphite of lead most easily removed , — but even were it to remain no injury could supervene , inasmuch as this agent is ...
... lead employed : this fear , too , practice demonstrates to be en- tirely without foundation , for not only is the sulphite of lead most easily removed , — but even were it to remain no injury could supervene , inasmuch as this agent is ...
Сторінка 22
... lead to mere speculations , of which science will supply one set and practice the other ; for you must allow me to say that practice has abundance of spe- culations of its own , which are often much wilder than those on which science ...
... lead to mere speculations , of which science will supply one set and practice the other ; for you must allow me to say that practice has abundance of spe- culations of its own , which are often much wilder than those on which science ...
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acetic acetic acid action alcohol alkaline alumina ammonia analysis appears applied arsenic baryta body boiling calcined carbonic acid caustic cent charcoal chemical chemists chloric acid chloride chloroform coloring matter combination composition compound containing copaiba copper crystallised crystals decomposed decomposition deposited diffusion dilute dissolved distilled water effect employed ether evaporated experiments extract fatty filtered furnace gallic acid give glass grains grammes heat hydrochloric acid hydrogen insoluble iodide iodine iron juice lead lime liquid liquor magnesia manufacture manure means mercury metal method mixed mixture nitrate nitric acid nitrogen obtained operation oxide oxygen Patent phosphate phosphoric acid phosphorus plants plate poison portion potassa potassium powder precipitate prepared present produced properties proportion pure resin salt separated silver small quantity soda soft roe soluble solution starch substance sugar sulphate sulphuret sulphuric acid surface tained temperature tion treated vessel washed weight yellow zinc
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Сторінка 44 - Chemical Analysis. THE COMMERCIAL HANDBOOK of CHEMICAL ANALYSIS ; or Practical Instructions for the determination of the Intrinsic or Commercial Value of Substances used in Manufactures, in Trades, and in the Arts. By A. NORMANDY, Author of " Practical Introduction to Rose's Chemistry," and Editor of Rose's " Treatise on Chemical Analysis.
Сторінка 514 - ... shall be as good and effectual to all intents and purposes as if this Act had not been passed.
Сторінка 171 - ... consequently its hardness is =4. The alloy is harder than copper, very tough, and is, in a properly managed fire, malleable; so much so that a key was forged out of a cast rod. These important properties of this alloy warrant an expectation of its application to many purposes in the arts, and it would appear that they depend on its definite chemical proportions.
Сторінка 494 - ... as fully master of the subject, as those whose official duty has led them to make it their peculiar study. The first point, to which I wish to call the attention of the committee, is the amount of what may be considered as the probable future income of the country ; and I will begin by recapitulating the result of the accounts for different years, which have been already stated.
Сторінка 39 - Organic matter dissolved in oil of vitriol was separated from it by a thickness of stratum of only four inches. A bottle of porter was by the same process deprived of nearly all its color.
Сторінка 514 - Act shall from time to time make out and maintain a complete register of all persons being Members of the said Society, and also of all persons being Associates and Apprentices or Students respectively, according to the terms of the Charter of Incorporation, and shall keep a proper index of the register, and all such other registers and books as may be required by the Council of the said Society, and may be necessary for giving effect to the bye-laws of the said Society, and to the provisions of...
Сторінка 17 - ... dissolved. From the few trials I have made, I may remark that sulphate of lime appears to be hardly less soluble, if at all less, in water saturated with common salt than in perfectly fresh water. This seems to be a fortunate circumstance in relation to the inquiry as to the means of prevention, and likely to simplify the problem.
Сторінка 514 - ... been established on their own account at the date of the said charter, or who should have been examined in such manner as the Council of the said Society should deem proper, or who should have been certified to be duly qualified for admission, or who should be persons elected as superintendents by the Council of the said Society : And whereas, it is expedient to prevent ignorant and incompetent persons from assuming the title of or pretending to...
Сторінка 265 - Is thus either wasted, by its escape, or is rendered injurious to the fabric, by remaining too long in contact with it. Now, instead of this, I adopt the following process, whereby the whole, or a great portion of the chlorine or chloro-compound, is kept in a combined state, and recovered for future use. By the term
Сторінка 513 - WHEREAS it is expedient for the safety of the public that persons exercising the business or calling of Pharmaceutical Chemists in Great Britain should possess a competent practical knowledge of Pharmaceutical and General Chemistry and other branches of useful knowledge...