

17 THOMSEN, JULIUS, Poggendorff's Annalen, cxx;?/ t 3 

 in abstract in Am. J. Sci., II, xli, 396, May, 1866. 



18 American Journal of Science, II, xli, 214, March, 



19 In this calculation the annual evaporation from the ocean is 

 assumed to be about 9 feet. (See Dr. BUIST, quoted in Maury's 

 Phys. Geography of the Sea, New York, 1861, p. n.) Calling the 

 water-area of our globe 150,000,000 square miles, the total evap- 

 oration in tons per minute, would be that here given. Inasmuch 

 as 30,000 pounds raised one-foot high is a horse-power, the number 

 of horse-powers necessary to raise this quantity of water 3 M miles 

 in one minute is 2,757,000,000,000. This amount of energy is pre- 

 cisely that set free again when this water falls as rain. 



20 Compare ODLING, WM., Lectures on Animal Chemistry, Lon- 

 don, 1866. "In broad antagonism to the doctrines which only a 

 few years back were regarded as indisputable, we now find that the 

 chemist, like the plant, is capable of producing from carbonic acid 

 and water a whole host of organic bodies, and we see no reason to 

 question his ultimate ability to reproduce all animal and vegetable 

 principles whatsoever." (p.. 52.) 



" Already hundreds of organic principles have been built up from 

 their constituent elements, and there is now no reason to doubt our 

 capability of producing all organic principles whatsoever in a sim- 

 ilar manner." (p. 58.) 



Dr. Odling is the successor of Faraday as Fullerian Professor 

 of Chemistry in the Royal Institution of Great Britain. 



21 MARSHALL, JOHN, Outlines of Physiology, American edition, 

 1868, p. 916. 



22 FRANKLAND, EDWARD, On the Source of Muscular Power, 

 Proc. Roy. Inst, June 8, 1866; Am. J. Sci., II, xlii, 393, Nov. 1866. 



23 LIEBIG, JUSTUS VON, Die organische Chemie in ihrer Anwen- 

 dung auf Physiologie und Pathologic, Braunschweig, 1842. Also 

 in his Animal Chemistry, edition of 1852 (Am. ed., p. 26), where he 

 says " Every motion increases the amount of organized tissue which 

 undergoes metamorphosis." 



24 Compare DRAPER, JOHN WM. Human Physiology. 



