The elements of chemistry / by Thomas Thomson.

  • Thomas Thomson
Date:
1810
Catalogue details

Licence: Public Domain Mark

Credit: The elements of chemistry / by Thomas Thomson. Source: Wellcome Collection.

    20/520 page 2
    Chemistry by a simple substance, is a substance not yet de- composed, and which we cannot shew to be a compound. Those of that kind at present known are about 48. They may be divided into two classes ; those which can be con- fined in vessels, and of course exhibited in a separate state; and those which cannot be confined in any vessels that we possess, and the existence of which is only inferred from certain phenomena exhibited by the first class of bodies in certain circumstances. The first class of bodies may be called confinabley the second unconfimble. DIVISION I. OF CONFINABLE BODIES. The confinable bodies may be arranged under the four fol- lowing heads: 1. Simple supporters of combustion. 2. Simple combustibles. 3. Simple incombustibles. 4. Metals. These classes shall be treated of in order in the four follow- ing chapters. Chap. I. ckf simple supporters of combustion. The term, Supporter of Combustion, is applied to those substances which must be present before combustible sub- stances will burn. Thus air is a supporter of combustion, because a caudle will not burn unless it be supplied with air.
    digitised image 1
    digitised image 2
    digitised image 3