Chemical method : notation, classification and nomenclature / by Auguste Laurent... ; translated by William Odling...

  • Laurent, Auguste, 1807-1853.
Date:
1855
Catalogue details

Licence: Public Domain Mark

Credit: Chemical method : notation, classification and nomenclature / by Auguste Laurent... ; translated by William Odling... Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    TEANSLATOE'S PREFACE. The collection of the materials for this work extended over a considerable period of time, the subjects were arranged by the author when on his death bed, and the posthumous publication, with the revision of the proofs, was intrusted to the care of a friend. Under these circumstances, it is not surprising that some slight discrepancies should here and there exist; that a rigid uniformity of treatment, an exact adaptation of parts to one another, should occasionally be wanting. Knowing that the majority of English students are almost unacquainted with Laurent's views; feeling the great im- portance of these views, and seeing how opposed they are to the opinions most prevalent in this country ; I have endeavoured, while giving a clear and truthful representation of the author's meaning, to put his ideas in such a form as should least estrange the mind of the reader; and, by avoiding any confusion of symbols or want of uniformity in expression, have sought to render the work acceptable to as large a class of chemists as possible. In the original work, four different systems of proportional weights are employed. 1°. The system of equivalents, ordinarily made use of in this country. Hydrochloric acid = H CI Water = HO Chloride of sodium = NaCl Oxide of silver = Ao;0. 2° The atomic system of Berzelius, in which the proportional weights of hydrogen, nitrogen, chlorine, &c., are halved. Hydrochloric acid =H2CP Water ^H^O Chloride of sodium = NaCP Oxide of silver =AfrO