7* (36) 



38 DRAPER, J. W., he. cit. 



39 HENRY, JOSEPH, Agric. Rep. Patent Office, 1857, 440. 



40 WAITERS, J. H., An Essay on Organic, or Life-force. Written 

 for the degree of Doctor of Medicine in the University of Pennsyl- 

 vania, Philadelphia, 1851. See also St. Louis Medical and Surgi- 

 cal Journal, II, v, Nos. 3 and 4, 1868; Dec. 1868, and Nov. 10, 

 1869. 



41 LECONTE, JOSEPH, The Correlation of Physical, Chemical and 

 Vital Force, and the Conservation of Force in Vital Phenomena. 

 American Journal of Science, II, xxviii, 305, Nov. 1859. 



42 LOMBARD, J. S., loc. cit. 



43 NOYES, T. R., loc. cit. 



44 WOOD, L. H., loc. cit. 



