306 Mr. Bevan’s account of an experiment , &c. 
produce a cubical condensation of | 6 - b , as found by Canton. 
Allowing, therefore, 33 feet for a column of water = the 
pressure of the atmosphere, and multiply this by 66000, we 
shall have 2.178,000 feet for the modulus of water, agreeing 
pretty nearly with the result of my experiments. 
I should not have troubled you with this letter, but as the 
frost may yet continue for a few days, an opportunity may 
be found of verifying, or correcting, the result of my expe- 
riments. 
I am, with the greatest respect, 
Your's truly, 
B. BEVAN. 
Leighton Bussard. 
Note by Dr. Young. 
It does not appear quite clear from reasoning, that the modulus ought to come 
out different in experiments on solids and on fluids : for though the linear com- 
pression in a fluid may be only £ as much as in a solid, yet the number of particles 
acting in any given section must be greater in the duplicate ratio of this compres- 
sion, and ought apparently to make up the same resistance. And in a single expe- 
riment made hastily some years ago on the sound yielded by a piece of ice, the 
modulus did appear to be about 800,000 feet only : but the presumption of accu- 
racy is the greater in this case the higher the modulus appears. 
