1817.} ‘ Scientific Intelligence. 258 
thread, the elasticity of the India rubber keeping the valve perfectly 
close. By this means a valve might be put to the end of any small 
tubé without increasing its diameter. I have tried this apparatus 
with condensed atmospheric air, and find the valve answer my 
utmost expectation. 
Iremain, dear Sir, yours, &c. 
J. T. BEALE, 
XVII. Another. 
(To Dr. Thomson.) 
SIR, Feb. 8, 1817. 
Observing in your number for this month a proposal for adapting 
to Newman’s blow-pipe separate reservoirs for the gases, I think it 
right to acquaint you that the thing proposed has been already done 
by entwining jet pipes of two distinct blow-pipes of Newman’s 
construction, and adapting a small cap with a capillary aperture to 
receive the separate gases, and re-issue them mixed. This instru- 
ment, which was ordered in November last, and completed some 
weeks ago, was constructed with a view to particular experiments, 
which are in progress; and the little that is peculiar in it bears 
reference to them, and need not now be explained. The principle 
is sufficiently simple. It may be enough at present to observe, that 
its performance is not equal to that of Newman’s blow-pipe with a 
single reservoir; though the heat which it does produce is intense. 
Iam, Sir, your most obedient servant, 
H. G 
XVIII. Another. 
(To Dr, Thomson.) 
DEAR SIR, 
- To the ingenious improvement proposed’ to Newman’s blow-pipe 
in your last, I shall beg leave to suggest an additional one, which is 
as follows :—Instead of having two reservoirs, 
let there be but one, made in the annexed 1 2 3 
manner, with three partitions. 1 is the space 
designed for the hydrogen gas, and 3 that for 
the oxygen; 2 may be either empty, or filled 
with water. 
B. P. certainly, Sir, deserves great praise for his proposition. It 
were well that every young chemist would exercise his ingenuity on 
this subject. 
Feb. 7, 1817. R. S. 
XIX. R. M. As Reply to the Queries of Civis. 
* The gentleman who signed himself R. M. A.” feels no hesita- 
tion in giving distinct answers to the queries of Civis in the Annals 
of Philosophy for February, 1817. 
Hyd. Oxy. 
