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Excerpt from Elements of Chemistry, Including the Applications of the Science in the Arts, Vol. 1 of 2
In preparing a new edition of his Elements of Chemistry, the Author has incorporated much new and accurate information with the old, while he has endeavoured to give to both the space and the measure of import ance which their true value demanded. In such a work, judicious selec tion of matter is as necessary as careful condensation, while the grounds of the selection are changed with the shifting point of view from which, in a progressive science, the retrospect is taken.
The, important bearings of the laws of Heat, particularly in reference to the physical condition of matter, have led to their consideration before the chemical properties of substances, in this as in most other elementary treatises on chemistry. Light is then shortly considered, chie¿y in refer ence to its chemical relations. The principles of its Nomenclature, in which, compared with many sciences, chemistry has been highly fortunate, are then explained, together with the symbolical notation and chemical formulae in use, by means of which the composition of highly compound bodies is expressed with the same palpable distinctness which, in arith metic, attends the use of figures, in the place of words, for the expression of numerical su'ms.
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