SÉANCE DU 21 MAI I907. Il35 



Second catalogue of variable stars, by Annie-J. Cannon, under llie direction of 

 Edward-G. I^ickering. {Annals of the astronomical Observatory of Harvard Collège, 

 t. LV, part I.) Cambridge, Mass., 1907; i fasc. in-4°. 



Eclipses of Jupiter' s satellites 1 878-1 908, published bj the Observatory of 

 Harvard Collège. Cambridge, Mass., 1907; i fasc. in-zj". 



The radio cosniic tlieory, by A. Biddlecombe. S. 1. n. d.; 1 fasc. in-8'', 



Over de exhaust-werking bij locomotiven, by F. -G. IIuygex. Rotterdam, 1907 ; 

 texte et planches contenus dans un étui in-8°, 



Commissào geographica e geologica do Estado de S. Paulo. Exploraçao do Rio 

 Tieté (barra do Rio Jacaré-Guassù ao Rio Paranà), 1906. Saô Paulo, 1907; i fasc. in-f°. 



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