Hydrogen-ion Concentration and Electrical Conductivity. 85 

 LITERATURE CITED. 



BiGELOW, H. B. 1917. Bulletin Museum of Comparative Zoology, Harvard University, 



vol. 61, pp. 163-357, 2 plates. 

 Gary, L. R. 1919. Year Book of the Carnegie Institution of Washington, No. 17, p. 168. 

 Henderson, L. J., and E. J. Cohn. 1916. Proc. Nat. Acad. Sci., vol. 2, pp. 618-622, 



Ifig. 

 Krogh, a. 1904. Meddelelser om Gronland, Heft 26, pp. 333-335; 409-434. 

 Mayer, A. G. 1917. Proc. Nat. Acad. Sci., vol. 3, pp. 548-552. 



1919. Proc. Amer. Phil. Soc, vol. 58, No. 2, pp. 150-160. 



McClendon, J. F. 1916. Journ. Biol. Chem., vol. 24, pp. 519-526, figs. 1-5; Ihid., 1917, 

 vol. 30, pp. 265-288. 



1916. Medical Review of Reviews, vol. 22, pp. 333-365, 14 figs. 



1918. Carnegie Inst. Wash. Pub. No. 252, pp. 213-258, 25 tables, 8 figs. 



, C. C. Gault, and S. Mulholland. 1917. Carnegie Inst. Wash. Pub. No. 251, 



pp. 21-69, 24 figs. 

 McEwen, G. F. 1910. University of California Publications, Zool., vol. 6, pp. 189-204, 

 2 text-figs.; Ihid., vol. 15, pp. 255-356, 38 plates, figs. a-c. 



1918. Bulletin Scripps Institution for Biological Research, Nov. 8, 1918, No. 



7, 20 pp. 

 Palitzsch, S. 1911. International Council for Study of Sea, Publications de Circon- 



stance, No. 60, 27 pp. 

 Raben, E. 1910. Wissen. Meeresuntersuchungen, Kieler Komm., Bd. 11, pp. Ill, 303, 



305. 

 Sorensen, S, p. L. 1909. C. R. Lab. Carlsberg, Kopenhagen, Bd. 8, pp. 1-168; also 



Biochem, Zeitschrift, Bd. 21, pp. 130-304. 

 Sandstrom, W. J. 1919. Canadian Fisheries Expedition, 1914-1915, pp. 221-343, 60 



text-figs., 15 pis. 

 Wells, R. C. 1918. U. S. Geological Survey, Professional Paper No. 120-A, pp. 1-16. 



EXPLANATION OF THE CHARTS. 



The charts show the Ph, temperature in degrees centigrade, and salinity of the sur- 

 face water in grams of total salts in 1,000 grams of sea- water. Thus 8.05-11 .9°-33.48 

 June 18 means that the Ph was 8.05, temperature 11.9° C, salinity 33.48 grams of 

 total salts in 1,000 grams of sea-water, and date June 18. Currents are indicated by 

 arrows. 



These charts represent results obtained on four voyages over the Pacific between 

 Samoa, or Fiji, and San Francisco, or Vancouver, British Columbia, and five voyages 

 over the Atlantic ranging from Nova Scotia to Trinidad, British West Indies. They 

 are intended to give a grapliical representation of the characteristic temperature, Ph, 

 and salinity in these regions. 



