ee

AS A MANURE,— 583

ammoniac*, during the procefs, quits the alkali, and unites with the lime, and the alkali is fuffered to fly off in a pungent vapour. The new fubftance formed by the union of the quick-lime with the muria- tic acid, is called guid fhell; and as this is readily foluble in water, it pafles off, to- gether with the remaining undecompofed ammoniacal falt, with the water through the filtre; while the uncauttic lime, as it was neither capable of acting upon the am- moniac, nor of being diffolved in the water, remains behind in its folid ftate.

* Crude fal-ammonaic is a compound falt, confifting of the muriatic acid and the volatile alkali.

OF THE FIRST VOLUME.

td z, o