19 



:Societ6 zoologique de Frauce: Bulletin. 9« anuee. Nos. 1 — 4. 

 Paris, 1884; 8". 



Society of Chemical Industry: The Journal. Vol. IV. Nr. 5. 

 Manchester, 1885; 8". 



United States: Coast and geodetic Survey: Report of the Super- 

 intendent showing- the Progress of the Work dnring the 

 fiscal year ending with Juue^ 1883. Parts I. & IL Washington, 

 1884; 4". Methods and Results, Determinations of G-ravity at 

 stations in Pennsylvania 1879 — 80. Appendix Nr. 19. 

 Report for 1883. Washington, 1884; 4^. 



