a

EF Sr

= fat

a

238 A. TREATISE ON THE CONNECTION OF

disengaged, but 7s really formed in the process, in the same

manner as oil is procured by distillation from mucilage OY

Zum.

Attempts have been made to classify manures, earths, and other substances, under the term of a¢tive and pas- sive. Lime is termed active, 7. e. it is said to possess a power of acting upon other substances, and of making these substances produce or give out to vegetables their proper food. By such theories the effects of lime are carried still further, by ascribing to them the power of rendering oil soluble in water. These oils are termed passive, and are supposed to be contained in dung. That such oils do not exist in dung, must be maintained, until a ¢rwe znflammable oil is procured from dung by expression, or by some process different from that of fire. What sort of oil is meant, the Author is really at a loss to discover; it cannot well be supposed to resemble sallad oil, nor any oil to be had

from perfumers, apothecaries, nor the oil shops!

It is known to every well informed chemist, as well as to soap-boilers, that hot lime does not produce, with ani- mal fat or oil, or with the expressed oil from vegetable

seeds