Elements of chemistry, including the recent discoveries and doctrines of the science / by Edward Turner.

  • Turner, Edward, 1798-1837.
Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: Elements of chemistry, including the recent discoveries and doctrines of the science / by Edward Turner. Source: Wellcome Collection.

    18/1106 (page 10)
    day, whose discoveries in Galvanism have compelled me to remodel the whole of the fourth section. To procure all the facts required for that purpose, I have been obliged to delay writing the section on Galvanism until the other parts of the volume were completed, This will account for the intercalation of a leaf at page 154, and for the labours of Mr. Faraday not being referred to in other portions of the volume, which, though placed after the fourth section, were, in fact, printed some weeks earlier. A few changes have been made in the section on the Laws of Combination, where will also be found a de- scription of the mode of employing Symbols in Chemis- try. I ventured in the last edition to introduce che- mical symbols as an organ of instruction, and subse- quent experience has afforded such convincing evidence of their value in this point of view, that I cannot too earnestly urge the chemical student to employ them at an early period of his studies. The present state of Chemistry renders the use of abbreviated or symbolic language almost unavoidable; and the question now is, not so much whether they shall be used, as whether they shall be generally understood. To ensure this, it is essential that a uniform system be adopted ; and I have hence felt the necessity of strictly conforming to the method introduced by Berzelius and adopted on the Continent. The Tables which have been given in the sections of the second and third parts, with the primary view of showing Analogies of chemical constitution, will serve the useful secondary purpose of supplying a guide to the employment of sym- bols. By reference to them, the student will see the