416 
MESSRS. T. E. THORPE AHD J. W. RODGER OH THE RELATION'S 
tliroiTgh until it is just underneath the cork of the bottle, H, containing the liquid to be 
introduced into the glischroraeter. A light glass bottle of about 25 cub. centims. 
capacity, to the base of which a disc of lead has been cemented to give it increased 
stability, was found of convenient size as a filling bottle. To the upper or free end of the 
vertical branch of the small T-piece, G, 2 centims. or so of narrow rubber tubing are 
fixed, which allow the short branch of a narrow siphon, K, to pass air-tight into the 
liquid in the filling bottle. The siphon was made by pulling out a piece of quill tubing 
ill the blow-pipe flame, and bending it twice at right angles. The long branch extends 
downwards some 35 centims. or so, parallel to the front side of the mahogany stand. 
The second vertical tube, E, leading to the air reservoir, is useful for quickly putting 
the air in the reservoir to atmospheric pressure. It can also be used to introduce 
dry air, or other gas, to the reservoir and filling bottle w'hen a hygroscopic or 
decomposable liquid is being employed. 
The other side of the stand is fitted with an exactly similar arrangement of pipettes 
and stop-cocks. A vertical brass rod, L, L, extends along the middle of the entire 
length of the front side of the stand at a distance of 2 or 3 millims. from it. Along 
this rod slides a closely-fitting brass tube, M, which can be clamped to the rod by 
a screw and milled head, N. Two cross-arms, 0, O, are attached to the brass tube, 
and the ends of these arms have been so constructed that they may be readily made 
to supi^ort and hold vertically tlie brass frame, P, P, carrying the glischrometer. 
By means of this arrangement the glischrometer can be brought under the long- 
branch of the siphon, and can be fixed with the end of the latter at any desired 
height within the right or the left limb. On regulating the heights of the mercury 
reservoir on the stand, and of the glischrometer, and manipulating the stop-cocks, a 
definite quantity of liquid can with ease be introduced or withdrawn from the 
instrument. 
On several occasions, during the course of the investigation, the glischrometer was 
treated with hot, strong nitric acid, in order to remove grease, free alkali, &c. 
While the glischrometer was drying, the filling bottle and siphon, which, of course, 
had been rinsed out with the same liquids as the glischrometer, wm-e also being dried. 
The bottle was heated on a steam tray, in a glass crystallizing dish, the top of which 
was covered by a glass plate to exclude dust. When warm, a stream of air filtered 
throuo’h cotton wool was blown through it. It was then corked, the ends of the 
X'piece being closed with short lengths of rubber tubing plugged by pieces of 
glass rod. 
The liquid under investigation was then distilled, in the apparatus described 
later, into the filling bottle. The latter having been repeatedly rinsed out with the 
dust-free liquid, a suitable quantity was then collected and the bottle corked. 
The siphon, which meanwhile had been kept on glass supports in a cupboard out of 
the way of dust, was now suspended over the steam tray, and a current of filtered air 
was then driven through it. When dry it was wiped on the outside with a clean silk 
