. Elements of chemistry ... Of what are matrasses made? For what purpose are these vessels used?What is a retort? How large are retorts? Of what are retorts made? Whatare the uses of retorts? What is a receiver, and what is its use ? Of whatare receivers made ? How does a tubulated, differ from a plain retort ? Whatis the us« of the tubulure. or opening, in this retort ? CHEMICAL APPARATUS. 115. tube, a part of this apparatus absolutely necessary in someprocesses, and which will be described in another place. 245. The alembic, Fig. 40, is used for the distillation or sublimation of solid, vol-
. Elements of chemistry ... Of what are matrasses made? For what purpose are these vessels used?What is a retort? How large are retorts? Of what are retorts made? Whatare the uses of retorts? What is a receiver, and what is its use ? Of whatare receivers made ? How does a tubulated, differ from a plain retort ? Whatis the us« of the tubulure. or opening, in this retort ? CHEMICAL APPARATUS. 115. tube, a part of this apparatus absolutely necessary in someprocesses, and which will be described in another place. 245. The alembic, Fig. 40, is used for the distillation or sublimation of solid, vol- Fig. 40. aile substances. It consists of two parts, the head a, which is ground on, so as to be perfectly tight, and the body b, which is set into a sand bath, when in use. The product of sublimation rises into the head, where it is condensed, and then runs down the spout into a receiver. ? 246. Evaporating dish, Fig. 41. Everychemical apparatus must have among itsutensils shallow dishes for evaporating flu-ids. The best are made of Wedgewoodsware, and come packed in nests containingseveral sizes each. The heat is applied bymeans of heated sand or ashes, and thesevessels are used to evaporate solutions ofsalts, in order to obtain crystals, and for various other pur-poses. 247. Fig. 42, a Florence flask, fur-nished with a tube, to be used instead ofa retort. Students will save consider
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