CHEMICAL APPARATUS. 



63 



Fig. 48a 



Fig. 489. 



Globe Receivers. (Figs. 488 and 489, as above.) Re- 

 ceivers are vessels, usually of glass, of a spherical form, 

 with a straight neck, into which the neck of the retort is 

 usually inserted. When any proper substance is put into a 

 retort, and heated, its volatile parts pass over into the re- 

 ceiver, where they are condensed. They are made plain 

 and tubulated, with ground stoppers. 



Price, - - gill, 25cts. ; | pint, 2 Sets. 



" - pint, 3 Vets. ; quart, 50cts. 



" stoppered, gill, 31cts. ; i pint, 37cts. 



" " pint, 44cts. ; quart, 63cts. 



Fig. 490. 



Fig. 401. 



The Alembic, for Sublimation and Distillation. (Figs. 

 490 and 491, as above.) The alembic is used for distilla- 

 tion, when the products are too volatile to admit of the use of 

 the retort. The alembic consists of a body, to which is 

 adapted a head. The head is of a conical figure, and has 

 its external circumference or base depressed lower than its 

 neck, so that the vapors which rise, and are condensed 

 against its sides, run down into the circular channel formed 



