8 | Letter from Dr. Prieftley. 
‘[Aug.1, 
The Depth of Rain by Mr. Farey’s Rain-gauges.—See Monthly Mag: Vol. XII. Page 92: 
Ox the Summit. 
In the Valley. 
The depth of fhow, which fell in Ja- 
uary, was nine inches, which, when re- 
duced by weight, &c. was found equiva- 
lent to 0.61 inches of rain, which fum has 
been added to all the guages for that 
month. 
Iam concerned to ftate, that the above 
_eoncludes the interefting experiments on 
the rain falling im different fituations, 
which my friend, Mr.Farey, was making; 
and doubt not, that the {cientific friends of 
that gentleman will hear with regret, that 
the changes confequent on the death of 
that truly illaftrious charaéter, the late 
Duke of Bedford, have caufed him to re- 
fign the fituation at Woburn, which, for 
hear ten years, he has fo honourably and 
wfefuliy filled. It is particularly to be re- 
gretted, that the very confiderable local 
knowledge, connected with geology, mi- 
neralogy, draining, &c. which his tharé in 
conducting thofe extenfive improvements 
of the late Duke had furnifhed him with, 
will probably be loft to this country, the 
importance of which was increafed by the 
number of very accurate obfervations that 
Major Mudge had the goodnefs to furnifh 
him with, to which he had conneSted a 
Meries of accurate levels for many miles 
round Woburn, all of which are ‘conneét- 
ed with the Grand function Canal, at 
Fenny Stratford, by means of which it 
might be conneéted with any part of Eng- 
land, lam, Sir, your's, &c. 
Leighton, Bedfordfiire, B. Bevan. 
Widg B65 2302. 
To the Editor of the Monthly Magazine. 
SIR, 
S you were fo obliging as to infert inyour 
extenfively circulating Magazine, fome 
* Two Months, 
articles that Iformerly fent you on the fub- 
ject of phlogiffon, I hope you will have ne 
objection to the following account of the 
different principles on which one of my 
experiments has been attempted to be re- 
conciled to. the antiphlogiftie theory ; 
and it is the only one that has been parti- 
cularly difcuffed by my opponents... 
Heating together finery-cinder and 
charcoal, neither of which, according to 
the new fyftem, contains any water, which 
is maintained to be the only fource of 
hydrogenous or inflammable air, I geta 
great quantity of one {pecies of this air. 
To account for this, Mr. Berthollet 
fays, that it muft come from the water, 
ftill adhering to the charcoal, or contained 
in its pores. But whatever moifture may 
adhere to charcoal, or any other fubftance, 
of which it does not make a confituent 
part, it would be expelled in the form of 
vapour, with the heat of boiling water} 
and this has been previoufly fubjetted to 
a much greater heat. 
Dr. Woodhoufe fays, that this’ inflam 
mable air comes from water in the finery 
cinder. But, according to the new theory, 
iron becoming finery cinder, imbibes not 
water, but pure oxygen from the water ; 
while the other conftituent part of this 
element, with the addition of calorique, 
takes the form of inflammable air; 
and water cannot be both decompofed 
and not decompofed in the fame procefs. 
The addition, therefore, that is made ta 
the iron, when it becomes finery cinder, 
muft either be wholly oxygen, or wholly 
water. . t 
In the laft place, Mr. Cruikfhank not 
finding any water in the materials, main- 
tains, that there is no oceafien for it; for 
that this infdammable air comes trom the 
cecompofition of fixed air, that this fixed 
alr 
