8o4 ACADÉMIE DES SCIENCES. 



tensité du son perçu varie en raison inverse du carré de la dislance à 

 laquelle on se trouve du corps sonore, et non en raison inverse de la 

 distance, comme la circulaire semble le dire. 



A i5 heures trois quarts l'Académie se forme en Comité secret. 



La séance est levée à 17 heures trois quarts. 



A. Lx. 



BULLETIN BIBLIOGRAPHIQUE. 



Ouvrages reçus dams les séances de février 1916 (suite). 



The Proceedings and Transactions of the A'ova Scotian Instilute of Science, 

 Halifax, Nova Scotia, Vol. Mil, Pari 3 and k; Vol. XIV. Part 1. Halifax, Printed 

 for the Institute by Royal Print and Lito, Ltd., io,i5; 3 fasc. in-8°. 



Annals of the solar physics Observatory, Cambridge, Vol. III, Part I. The solar 

 rotation in j une 191 1, front spectrographic observations made with the M c Clean 

 solar instruments, by J.-B. Hubrecht, M. A. Cambridge, the Universily Press, 1910; 

 1 vol. in-4°. 



The Teaching of the //istory of Science, by Frederick E. Brasch; reprinted from 

 Science, N. S., Vol. XL1I, n° 1091, p. 746-770, november 26, 1910; 1 fasc. in-8°. 



Wisconsin geological and natural history Survey. The Geography of the Fox- 

 Winnehago Valley, by Ray Hughes Whitbeck. Madison, Wis., published by the 

 State, 1913; 1 vol. in-8°. 



University of Cincinnati Studies. Séries II. Vol. X, Part 1 : The Evolution of a 

 Gravitating, Rolaling, Condensing Fluid, bv Iïllioth Smith. Published by the Uni- 

 versity, 1915; 1 fasc. in-8°. 



(A suivre.) 



