BARUS. J 
DEGREE OF CONSTANT TEMPERATURE. 
59 
too liable to break at the fused joints. In the form used the tubes v T 
and tot were about 25 cm long and about 2.5 cm wide. 
Fig. 1. Apparatus for constant temperature between 0° and 100°. Scale, $. 
Boiling points between 100° and 300°. — In Fig. 2 we give a form of ap- 
paratus constructed on the typical plan indicated above, and which is 
adapted to temperature between 100° and 300°. It consists essentially 
of a large sphere, A A A, of copper, 25 cm in diameter, the joints of which 
are brazed. 
Through the bottom of this a somewhat conical central tube, d d, pro- 
jects into the interior as shown, the tube communicating below with an 
iron gas-pipe, efg h, leading to the condenser. The neck or head, fc, of 
the spherical copper bottle is in connection with a wide glass tube, 1c m, 
kept in place by a gallows adjustment, the top of which, m, is of iron 
and provided with two lateral steel rods or bolts. These being fastened 
(713) 
