1268 ACADÉMIE DES SCIENCES. 



un de ses ancêtres, daté du 20 novembre 1770, intitulé : Projet d'un bâtiment 

 de mer pouvant naviguer entre deux eaux. (Présenté par M. L. Bertin.) 



La séance est levée à 16 heures et quart. 



É. P. 



BULLETIN BIBLIOGRAPHIQUE. 



Ouvrages reçus dans les séances d'avril 1922 {suite). 



Semicentennial publications of the University of California, 1868-1918 : 



— Tlie binary stars, by Robert Grant Aitken. NeAv-York, Douglas G. Me. Murtrie, 

 1918; I vol. 23'='". 



— Catalogue of the heiniplera of america north of Mexico., excepting the aphi- 

 didœ, coccidœ and alearodidœ, bj Edward P. Van Duzee. Berkeley, University of 

 California press, 1917; i vol. 26''™. 



— Electrical phenomena in paraUel conductors. Vol. I : Eléments of trans- 

 mission., by Frederick Eugène Pernot. New-York, John Wiley, 1918; i vol, 24'^'". 



— The fondamental équations of dynamics and ils main coôrdinate septems 

 vectorially trealed and illwitrated from rigid dynamics, by Frederick Slate. Ber- 

 keley, University of California press, 1918; i vol. 22"^™. 



— The gaine birds of California., by Joseph Grinnell, Harold Child Brvant and 

 Tragy Irvlv Storiîr. Barkeley, University of California press, 1918; i vol. 26°'". 



— Logarithme of hypirbolic fanctions to twelve significant figures., by Frederick 

 Eugène Pkrnot and Baldwin Munger Woods. Berkeley, University of California press* 



1918 ; I vol. 26"=". 



— The physical chemistry of the proteins., by Brailsford Robertson. New -York, 

 Longmans, Green and Co., 1918; i vol. 23"=™. 



— 7he theory of the relalivity of motion., par Richard C. Tolman. Berkeley, Uni- 

 versity of California press, 1917; i vol. 24*"". 



— Typhoid fever, cousideréd as a problem of\scientific medicine^ by Frederick 

 P. Gay. New-York, The Macmillan Company, 1918; i vol. 24'='". 



— Studies of the nebulœ made at the Lick Observatory, University of California, 

 at Mount Hamilton, California and Santiago, Chile. University of California press, 

 1918; I vol. 3i'='". 



— Miscellaneaus studies in agriculture and biology. University of California 

 press, 1919; I vol. 26*=™. 



{A suivre. ) 



