LAR) 
Selbstandige Werke oder neue, der Akademie bisher nicht 
zugekommene Periodica sind eingelangt: 
Prankiiiietnstituter of the State of, Pennsylvania, [he 
Journal of the Franklin Institute devoted to Science and 
the Mechanic. Arts. Vol. CXLIV, No 859. July, 1897. I. 
Philadelphia; 8°. 
Peooerepattment of Agriculture (Weather Bureau, 
Washington), Monthly Weather Review. April, 1897, 
Washington; 4°. 
Instituto Geolégico de México, Boletin de la Commission 
Geoloégica de México, Nums. 1, 2 (1895); 7—9 (1897), 
México, D. F.; 4° | 
