Volume 5

Elements of natural history, and of chemistry / being the second edition of the ... lectures ... first published in 1782 ... translated into English with occasional notes, and an historical preface by the translator [W. Nicholson].

  • Fourcroy, Antoine-François de, comte, 1755-1809
Date:
1788-1789
Catalogue details

Licence: Public Domain Mark

Credit: Elements of natural history, and of chemistry / being the second edition of the ... lectures ... first published in 1782 ... translated into English with occasional notes, and an historical preface by the translator [W. Nicholson]. Source: Wellcome Collection.

    300/408 (page 286)
    fubflances not yet decompofed which we are acquainted with, and which are inferted in the firft column. The correfpondent hori- zontal divifions of the five following co- lumns, comprehend the principal combinations of thefe fimple fubftances, and muft therefore be equally numerous in each column. We fhall proceed to give an account of the principal circumftances which offer themfelves in the confideration of thefe columns. Column the First. The firft column, marked by the Roman numeral I. is entitled, Siibjlances not decom-^ pofed. We muft here remark^ that thefe bo- dies are fimple to us only becaufe we have not yet fucceeded in analyling them. All the accurate experiments which have been made for the laft ten vears, fliew that thefe bodies cannot be feparated into fubftances of a more fimple nature, and that they cannot be repro- duced by artificial compofitions. Thefe fub- ftances are, as we liave already obferved, 55 in number. Oppofite each of thefe is placed, in Arabian charafters, the number which de- notes the place of each body, and of its cor- rrfpofident compounds in the other columns. The horizontal lines are, therefore, by this .dlfpofition, continued abfolutely from the firft column to the fixth 3 and all the horizontal com-