480 A. W. Wright— Distillation of Mercury in Vacue. 
itself. The principal member of the still consists of a single 
continuous piece of 
description, may be regarded as made up several distinct 
parts designated by the ‘letters biecdecs, a, 
The portion 6 is a straight, rather heavy piece of tubing, of 
about one centimeter exterior, and five or six millimeters in- 
terior, diameter. Its length is a little more than 76 centi- 
meters. t is open at the lower extremity, and at the 
other is enlarged to an oval bulb, c, about 85 mm. in diameter 
and 120 mm. long. At the upper end of this is joined the 23% 
tion d, e, having an interior caliber of about 15 mm. ‘The ver- 
tical portion next to ¢c is 25 mm., the inclined portion, d, 130 mm. ; 
and the sloping part, e, 300 mm. in length. The object in 
making d so long and giving it the inclined position was to 
glass work, which, for convenience “of 
