I'EW THEORIES AND FACTS OF HEAT. 
477 
THE COLEMAN PETZE. 
The Governors of the Royal Veterinary College, at their 
meeting July 11th, having received the report of the pro¬ 
fessors relative to the comparative merits of the papers of 
the several competitors for the above prize, proceeded to 
open the sealed envelopes bearing the corresponding mottoes, 
-and afterwards made the following awards : 
The Silver Medal. —To Mr. S. L. Buckley, Oldham, 
Lancashire. 
The Bronze Medal. —Mr. C. J. Pyatt, Nottingham. 
Certificate of Merit. —Mr. Thos. Walley, Market 
Drayton. 
Extracts from British and Foreign Journals. 
NEW THEORIES AND PACTS OP HEAT. 
POUND of iron on being heated from 32° to 212^ ex¬ 
pands by about l-800th of the volume which it possesses at 
32k Its augmentation of volume would certainly escape the 
most acute eye; still, to give its atoms the motion corre¬ 
sponding to this augmentation of temperature, and to shift 
them through the small space indicated, an amount of heat is 
required which would raise about 8 tons 1 foot high.’^. 
Tlie velocity of bodies falling to the earth is known to aug¬ 
ment as the height from which they fall is increased, but not 
in simple proportion. “If the height be augmented fourfold 
the velocity is only augmented twofold ; and if the height be 
increased sixteenfold, the velocity is only augmented fourfold, 
but the heat generated by the collision of a falling body in¬ 
creases simply as the height, and consequently as the square 
of the velocity.-^ Thus trebling the velocity will yield, on 
arrest of the motion, nine times the heat. Every one knows 
tliat when the break is applied to the wheel of the railway 
carriage, the stoppage of motion is accompanied by a great 
evolution of heat; and as the weight of the eatth is enor¬ 
mously greater than that of a railway wheel and train, and 
its velocity of rotation immensely quicker, a similar arrest of 
