Mr. Charlesworth on the Crag of Suffolk, &c. 529 
it*. I therefore published on the 1st of January of the fol- 
lowing year (1824) a historical statement respecting the lique- 
faction of gases+, the beginning of which is as follows: 
“* I was not awareat the time when I Jirst observed the lique- 
faction of chlorine gas, nor until very lately, that any of the 
class of bodies called gases had been reduced into the fluid 
form; but having during the last few weeks sought for in- 
stances where such results might have been afforded without 
the knowledge of the experimenter, I was surprised to find 
several recorded cases. I have thought it right, therefore, to 
bring these cases together, and only justice to endeavour to 
secure for them a more general attention than they appear as 
yet to have gained.” Amongst other cases the liquefaction of 
chlorine is clearly described}{. The value of this statement of 
mine has since been fully proved; for upon Mr. Northmore’s 
complaint ten years after, with some degree of reason, that 
great injustice had been done to him in the affair of the con- 
densation of gases, and his censure of “the conduct of Sir 
H. Davy, Mr. Faraday, and several other philosophers for with- 
holding the name of the first discoverer,” I was able by re- 
ferring to the statement to convince him and his friend that if 
‘my papers had done him wrong, J at least had endeavoured 
also to do him right §. 
Believing that I have now said enough to preserve my own 
“honest fame” from any injury it might have risked from 
the mistakes of Dr. Davy, I willingly bring this letter to a 
close, and trust that I shall never again have to address you 
on the subject. 
I am, my dear Sir, yours, &c. 
Richard Phillips, Esq., &c. &c. M. Farapay. 
a 
XC. On the Crag of Suffolk, and on the Fallacies connected 
with the Method now usually employed Sor ascertaining the 
relative Age of Tertiary Deposits. By Epwarpv Cuar.es- 
worn, Esg., F.G.S. 
To the Editors of the Philosophical Magazine and Journal. 
GENTLEMEN, 
[X former communications I treated of the crag as a ter- 
tiary formation consisting of separate marine deposits, and 
* Monge and Clouet had condensed sulphurous acid probably befere the 
year 1800. Northmore condensed chlorine in the years 1805 and 1806. 
t Quarterly Journal of Science, vol. xvi. p- 229. t Lbid., p. 236. 
§ Lond. & Edinb. Phil. Mag. 1834, vol. iv. p- 261, 
Third Series. Vol.8. No. 50, Supplement, June 1836. 3 H 
