the late Mr. Henry. 219 
potissimum, non minus valeam, quam puer 
valui.”’ : 
During the long season of Mr. Henry’s ac- 
tivity as a member of this Institution, his com- 
munications to it were very frequent. Many 
of these were intended only to excite an evene 
ing’s discussion, and having served that pur- 
pose were withdrawn by their author; but the 
number is still considerable, which are pre- 
served in the Society’s published volumes. 
As might be expected, they are of various de- 
grees of merit, but there are among them two 
papers, which have contributed greatly to his. 
reputation as a chemical philosopher.* 
‘* The following is a list of Mr. Henry’s papers, that are 
dispersed through the printed Memoirs of this Society. 
In Vou. I. (1.) An Essay on the Advantages of Literature 
and Philosophy in general, and especially on the Con- 
sistency of Literary and Philosophical with Commercial 
- Pursuits. 
(2.) On the Preservation of Sea Water from Putrefaction 
by means of Quicklime. 
(3.) On the Natural History and Origin of Magnesian 
Earth, particularly as connected with those of Sea Salt. 
and Nitre, with Observations on some Chemical Pro- 
perties of that Earth, which have been hitherto un- 
known or undetermined. 
'n Vor. II. (1.) Experiments on Ferments and Fermenta- 
tion, by which a Mode of exciting Fermentation in 
Malt Liquors, without the aid of Yeast, is pointed out ; 
with an attempt to form a new Theory of that Process. 
