THE 



LONDON AND EDINBURGH 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



[THIRD SERIES.] 



APRIL 1835. 



XL. Notice of a Memoir on the Natural Laws which appear 

 to regulate the Distribution of the Powers of producing Heat 

 and Light among the different Groups of the Animal Kijig- 

 dom. By E. W. Brayley Jun., F.L.S., F.G.S., Librarian 

 to the London Institution. 

 nPHE following paper was read before the Section of Natural 

 -■- History of the British Association for the Advancement 

 of Science, at the meeting at Cambridge, on the 26th of June 

 1833. (Lond. and Edinb. Phil. Mag., vol. iii. p. 155.) It was 

 then transferred to the officers of the Section, but by some ac- 

 cident was not received by the Secretaries of the Association, 

 which precluded its appearance in the " Report of the Third 

 Meeting;" since, although every facility for its publication 

 was afforded by the Secretaries, the author was prevented by 

 official engagements from preparing a fresh transcript in time 

 for its appearance in that Report, in which, therefore, its com- 

 munication only could be noticed in the '' Proceedings of the 

 Meeting." (p. xxxiv.) It is now printed exactly as it was 

 read before the Section, a few verbal alterations excepted ; the 

 author intending, in a future communication, to announce 

 some modifications and extensions of his views on the subject, 

 which subsequent inquiries, and certain recent discoveries as 

 well in zoology as in physics, have induced him to propose. 



It may be well to add, in explanation of the particular form 

 of the communication, that it was drawn up in express com- 

 pliance with the desire intimated in the preface to the " Re- 

 port of the First and Second Meetings " of the Association, 

 TJiird Series, Vol. 6. No. 34. Ajml 1835. 2 I 



