1025 
DC remaining in its fixed position. Thus the two phases in the glass 
tube QO change places, passing through each other and becoming 
perfeetly mixed. 
The handle N cannot be directly fastened to the steel observation 
vessel ZL. This vessel must namely be surrounded by a thermostat. 
Quite apart from high or low temperatures, which would make it 
quite impossible, it would be inconvenient even at the temperature 
of the room when the handle V was /nside this thermostat. There- 
fore the connection of the observation vessel 1 with .V has been 
effected as follows. The rod P? connected with the handle (of which 
only part has been drawn) passes closely fitting through a stuffing 
box (not drawn in the figure) in the wall of the thermostat, so that 
P can still be moved forward and backward and rotated in the 
thermostat wall. The rod / terminates in a fork Q. which in the 
position drawn in the figure encloses a pin FR, which is rigidly 
attached to the flange G,, which like G, is again rigidly connected 
with £ by means of bolts and nuts. 
So in the position represented in the figure / can be rotated by 
PN; if P is drawn back in the stuffing box of the wallof the ther- 
mostat, 7, and together with it the thermostat, gets quite clear of 
BG, candid. : : 
The whole arrangement is fur- 
ther elucidated by fig. 3. It exhi- 
bits the large SCHAFFER and BUDEN- 
HA BERG hydrostatic press for 6500 
Ll ©: 7 : : 
FST TT atmospheres, belonging to the vaN 
|| 5 lei \ || DER Waats-fund with the mano- 
ts] { / \ : : 
| errs y Nl meter standing on it. The pump 
| Nee ie | 
= hh i is also connected with the Jarge 
pressure-balance (not drawn) as a 
control for the manometer. One of us (K.) hopes soun to give a full 
description of these apparatus in connection with other experiments. 
The press is in connection with the tube conduit CC, C,, from which 
it can be shut off if necessary, by means of the high pressure cock 
7. There are two couplings S, and S, in this tube conduit, to which 
we shall presently return. Inside the thermostat C' rests on the bear- 
ing V,, which in its turn rests on the bottom of the sheet iron 
thermostat, This bearing at the same time fixes the tube C, so that 
the tube is prevented from turning round with the vessel 4. A second 
bearer WV, supports the rod P, which is already known to us from 
fig. 2. Fig. 3 also displays the stuffing box in the wall of the ther- 
mostat through which / passes. The thermostat is represented in 
