20 



Prof. G. Hinrichs, Iowa-City^ Iowa. 



233. G. Hinrichs. Contributions to Molecular Science, or 

 Atomechanics. No. 3, 4. Salena 1870. 



234. — The principles of pure Crystallography. Davenport 

 1871. 



235. Report of the Commiltee on building stone to the Board 

 of Capitol Commissioners of the St. ofJowa. Des Moines 

 1871. 



Dr. Charles A. White i Iowa- City, Iowa. 



236. Ch. A. White. Report on the Geologicai Survey of the 

 State of Jowa. Voll. I, II. Des Moines 1870. 4to. 



William H. Dall, Chicago^ Illinois. 



237. W. H. Dall. On the genus Pompholyx and ils allies, 

 wilh a revision of the Linanæidæ of authors. Reprinted 

 from Annals of the Lyceum of Nat. Hist. Vol. IX. 



238. Flere Særtryk af Afhandlinger i «Amer. Journal of Con- 

 chologyi) osv. 



Professorerne B. Silliman og James D. Dana^ New Haven. 



239. The American Journal of Science and Arts. Second 

 Series. Vol, XLIX— L. N»* 147—150. Third Series. 

 Vol. I. N«^ 1 — 3. New Haven 1870—71. 



E. I. Cox, State Geologist, Indianapolis, Indiana. 



240. First annuai report of the Geological Survey of Indiana. 

 Indianapolis 1869. 



The Navy Department, Washington. 



241. Naval Hygiene by Joseph Wilson, with an appendix: 

 Moving wounded men on shipboard, by Albert C. Gorgas, 

 Washington 1870. 



Wm, Wagner, President of the Wagner Free Institute of Science, 

 Philadelphia. 



242. Announcement of the Institute for 1870 — 71. Phila- 

 delphia 1870. (2 Expl.) 



Unavngivne (ved Smithsonian Institution). 



243. J. A. Garfield. The American census. New York 1 869. 



