REPORT OF THE PRESIDENT, 1922. 25 



Hay, O. P. Description of a new fossil sea-cow from Florida, Metaxytherium floridanum. 



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 . Observations on some extinct elephants. 19 pages, pis. i-iv, text-figs. 1-10 (June 12, 



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Further observations on some extinct elephants. Proc. Biol. Soc. Wash., vol. 35, 



97-102 (1922). 

 Hertzsprung, Ejnar. Effective wave-lengths of 139 stars within 0?5 of the North Pole and the 



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 Heuser, C. H. See Hartman, C. 

 Hines, M. Studies in the growth and differentiation of the telencephalon in man: The fissura 



hippocampi. Jour. Comp. Neurol., vol. 34, 73-171 (1922). 

 Hodges, J. H. See Richards, Theodore W. 

 Hogue, M.J. A comparison of an ameba, Vahlkampfia patuxent, with tissue-culture cells. Jour. 



Exper. Zool., vol. 35, 1-11 (1922). 

 Honeywell, H. E., and Oscar Riddle. Increased blood sugar coincident with ovulation in 



pigeons. Proc. Soc. Exper. Biol, and Med., vol. 19, 337-380 (May 1922). 

 Hostetter, J. C, and H. S. Roberts. Note on the dissociation of ferric oxide dissolved in glasB 



and its relation to the color of iron-bearing glasses. (Papers on Optical Glass, No. 39.) 



Jour. Amer. Ceram. Soc, vol. 4, 927-938 (1921). 

 Hubble, Edwin. A general study of diffuse galactic nebulae. Astrophys. Jour., vol. 56(1922); 



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 Hughson, W. Localization of cutaneous nerves by electrical stimulation, applied to nerve- 

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Humason, Milton L. Discovery of bright hydrogen lines in the spectrum of the variable star 

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. An M-type star whose spectrum contains bright lines. Pubs. A. S. P., vol. 34, 133- 



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. Nova No. 21 in the Andromeda nebula. Pubs. A. S. P., vol. 34, 222-223 (1922). 



, and Paul W. Merrill. Ten stars of class B having the Ha line bright: Third list. 



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Joy, Alfred H. Spectroscopic observations of RS Canum Venaticorum. Pubs. A. S. P., vol. 

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. Approximate orbit and absolute dimensions of S Antliae. Read at Middletown meet- 

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Kapteyn, J. C. First attempt at a theory of the arrangement and motion of the sidereal system. 



Astrophys. Jour., vol. 55, 302-328 (1922); Mt. Wilson Contr., No. 230. 

 , and P. J. Van Rhijn. On the upper limit of distance to which the arrangement of stars 



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 Kidson, E. The completion of the general magnetic survey of Australia by the Carnegie Institu- 

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 King, Arthur S. Note on the thickness of air required to produce the atmospheric absorption 



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 . Electric furnace experiments involving ionization phenomena. Astrophys. Jour., vol. 



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 . Ionization and absorption effects in the electric furnace. Proc. Nat. Acad. Sci., vol. 8, 



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The enhanced lines of scandium as ionization indicators. Pubs. A. S. P., vol. 34, 220 



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Kirkpatrick, W. F. See Harris, J. Arthur. 



Kofoid, Charles A., and Olive Swezy. On the free, encysted, and budding stages of Council- 

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, . Councilmania lafleuri, a new amoeba of the human intestine. Proc' Soc. 



Exper. Biol, and Med., vol. 18, 310-312 (1921). 



On the occurrence of Endamceba dysenterise in bone lesions in Arthr itis 



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