(131) 
above, but by far the greater part flows down along the inner wall 
of this cylindrical glass; it is conducted further by an exceedingly 
thin brass continuation D, and flows out over the lip Da into the 
beaker B, destined for receiving the liquid. Applying the eye to 
the oval observing-tube Ky and securing a sufficient illumination 
by means of the opposite oval iliuminating-tube Vo we may see 
the liquid descending in a little jet or in drops and gathering in 
the beaker. 
The cylindrical glass C, suspended by means of thin copper strips 4), 
as well as the continuation D, which is kept in its place by means 
of little pieces of cork y, are almost unaccessible for heat by con- 
duction, especially when the cold vapours of the liquid which 
ascend from the receiving vessel B, have exerted for some time their 
refrigerating action on the surroundings”). Again the beaker B, is 
screened from external heat by a double gas-layer between the 
beakers Bj, By and B; round which the escaping vapours are con- 
ducted in a manner to be described presently. By means of a glass 
ring, Bj and a border of ebonite R, the beaker is fastened to the 
inner of two thin copper pieces Lj aud £,, constituting together a 
double cover. In this cover are placed, as in the model described in 
Dec. ’94, two tubes Fi and Gj, one of which receives the jetcatcher 
C, whilst the other one serves to admit the measuring-apparatus, 
to be immersed in the bath of liquefied gas. In the case depicted this 
latter is the covering of Dr. HASENOEHRL's condenser, the glass tube g 
of which is fastened by means of a tube of caoutchoue 7, and brass 
tightening bands 43 in the tube F, which is on the right hand of the 
boiling-glass. By this means the boiling-glass is closed on this side. 
The vapours evolved from the liquid escape through the tube G, 
on the left hand, which is covered by a second, wider tube Gy. 
This latter tube, which by means of a caoutchouc tube G; and a 
brass band is fastened to the wooden cock-box $3, prevents the gas 
from escaping and conducts it towards the outer piece Z of the double 
cover. The glass tube *) is fastened to this by means of a cork ring 
F,, and the two pieces of the double cover are united by the caout- 
choue ring £3. The outer cover fits by means of A, on to a beaker 
B,, a little wider than the receiving beaker B, together with its 
surrounding glasses. Besides these beakers, which moreover are sus- 
') To the glass G,; (the strips are omitted in the drawing). 
2) Silvering the glass where it does not need to be transparent was not yet necessary 
and was therefore omitted for the sake of simplicity. 
3) G, serves to screen G3 from external heat, 
