36 PROCEEDINGS OF THE CANADIAN INSTITUTE. 
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Prag, 1881. 
31. Jahresbericht der K. bohmischen Gesellschaft der Wissenschaften in Prag, 
17 Juni, 1881, do. 10 Juni, 1882. 
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1881-82. 
34, Proceedings of the Cambridge Philosophical Society, Vol. 4, Parts 2, 3, 4, 
5, 1881-82. 
35. Transactions of the Cambridge Philosophical Society, Vol. 13, Part 2, 1882. 
36. Abhandlungen herausgegeben yon naturwissenschaftlichen Verein zu 
Bremen, 8 Band, 1 Heft, Bremen, 1883. 
37. Mittheilungen der K. K. Geographischen Gesellschaft in Wien, 1882, 25 
Band. 
38. Sitzungsberichte der Naturwissenschaftlichen Gesellschaft, ‘‘ Isis” in 
Dresden. 
Jahrgang, 1868, Nos. 1,-2, 3, 7, 8, 9, 10, 11, 12, 3 Nos. 
es 1869, ‘* 1—12, 4 Nos. 
ae 1870, << 4—1283e0- 
6 1871, ‘© 1—12,4 * 
es W872; * 1—airaaress 
ae 1873; °°  1—)2ee« 
es 1874, “ 1—12,3 * 
“e 1875, ce 1—12, Wi, ce 
se 1876; “*. d= 
«6 18i7, ‘* 1—12R38m ** 
es 1878, °° lias 
Mr. J. M. Clark, B. A., then read a paper entitled :— 
SOME THOUGHTS ON THERMOTICS. 
In the following paper it is proposed to consider in a few of their 
many aspects, the nature of heat, the laws of its propagation, its 
causes and its effects, noticing its correlation to the other forms of 
energy, and some more or less important applications of what we 
shall give some reasons for considering the true theory of heat to 
some of the problems of Chemistry, Geology and Meteorology. Heat 
being that in material bodies, which causes in us the sensation by 
virtue of which we call bodies hot or cold, hotter or colder, it is 
important at the outset to understand what that something in the 
physical world is. Prof. Tait, the eminent Natural Philosopher, in 
his valuable historical sketch of the Theories of Heat, says, that in 
the physical world, besides the inevitable Time and Space, there are 
but four elementary ideas, namely :—Matter, Force, Position and 
Motion. This statement seems open to very serious objection. 
‘Though time may from one point of view be regarded as one of the 
