On the sheatiepes of Water. 351 
pressure, it indented neatly double the compression shown 
by the former. (d) — 
This inca constructe a follows, Fig. 3 bei 
section of it. It is simply a ering tube, ny 
end, B, and water-tight. At the upper Sake € pare te 
allowed to enter through a small aperture, Be closed by a 
very sensible valve, opening inwards. The tube is flattened 
at D, in order that it may drei to the expansion of the 
water, when taken out of the press 
‘@) It seems scarcely credible, that the whole difference between the re- 
sults of these two sets Par yi ARR NY hy = eae sare, of the rod, 
employed i 
perature ater in t eX] I wo! dbe sufficient 
to account for the difference. The temperature of the in the cannon 
was undoubtedly raised, 7 a diminution of : nip heat 5 analog to what 
takes place in other cases of compression ; | but, unless the experimen sup te 
c eted ina very fi Lb 
nearly to a level with that of the werromediog: ais Wa xe ot awe 
what was allowed for the equilibrium Y of of temperature to be A ma 5 
of e; t 
- in the piezometer on compression, as is easily infer 
Ugatom of Dela mont have ten no less than 26°, te fibheeke barons 
in pee Ne ot ore than an ‘error was committed in 
not gi 
e 2 The valve, Cy elm sora - 
niga made of preatstrengtly would cease 
