REPORT OF THE PRESIDENT, 1921. 25 



Richards, Theodore W., and Ali^n W. Rowe. The heats of dilution and the specific heats of 



dilute solutions of nitric acid and of hydroxides and chlorides and nitrates of lithium, sodium, 



potassium, and cesium. Jour. Amer. Chem. Soc, vol. 43, 770 (Apr. 1921). 

 Riddle, O. Calorimetric determinations of the energy in yolk-protein and yolk-fat of doves and 



pigeons. Science, n. s., vol. 51, 350 (1920). 

 . Differential survival of male and female embryos in increased and decreased pressures of 



oxygen. Proc. Soc Exper. Biol, and Med., vol. 18, 88-91 (1920). 

 . General effects of increased and decreased pressures of oxygen on dove embryos. Proc. 



Soc. Exper. Biol, and Med., vol. 18, 102-105 (1921). 

 . Inadequate egg shells and the early death of embryos in the egg. Amer. Jour. Phys., 



vol. 57, 250-263 (1921). 

 , and E. H. Behre. On the relation of stale sperm to fertility and sex in ring-doves. 



Amer. Jour. Phys., vol. 57, 228-249 (1921). 

 , and M. C. Hanke. Effects of feeding soluble calcium salts upon reproductive secretions 



and upon the total inorganic constituents of the egg shell. Amer. Jour. Phys., vol. 57, 



264-274 (1921). 



and C. V. King. The relation of nerve stimuli to oviducal secretions as indicated by 



effects of atropine and other alkaloids. Amer. Jour. Phys., vol. 57, 275-290 (1921). 

 Ritchie, Mary. See Shapley, Harlow. 

 Roberts, H. S., and F. Hastings Smyth. The system copper : cupric oxide : oxygen. Jour. 



Amer. Chem. Soc, vol. 43, 1061-1079 (1921), 



. See Smyth, F. Hastings. 



RowE, Allan W. See Richards, Theodore W, 



Russell, Henry Norris. Rubidium in the sun. Read at Berkeley meeting, A. S. P. (1921); 



Pubs. A. S. P., vol. 33, 202-204 (1921). 

 Sarin, F. R. Healing of end-to-end intestinal anastomoses, with special reference to the re- 

 generation of blood-vessels. Johns Hopkins Hosp. Bull., vol. 31. 289-300 (1920). 

 Sanford, Roscoe F. The orbits of seven spectroscopic binaries. Astrophys. Jour., vol. 



53, 201-223 (1921); Mt. Wilson Contr., No. 201. 

 . Two stars of spectral class R with large radial velocities. Pubs. A. S. P., vol. 32, 



278-279 (1920). 



. Note on the spectroscopic binary p Velorum. Pubs. A. S. P., vol. 33, 173-174 (1921). 



Saeton, George. Synthetic bibliography with special reference to the history of science. 



Isi.s, vol. 3, 159-170 (1920). 

 . Herbert Spencer (with bibliographical and iconographical notes). Isis, vol. 3, 



375-390, portrait (1921). 

 . Eighth critical bibliography of the history, philosophy, and organization of science 



and of the history of civilization (to April 1920). Isis, vol. 3, 316-371 (1920). 



. Ninth critical bibliography, etc. (to August 1920). Isis, vol. 4, 451-503 (1921). 



. Science and fetyle. Scribner's Mag., vol. 69, 755-759 (June 1921). 



. Isis: International review devoted to the history of science and civilization (editor). 



Vol.3, 157-570 (1920-1). 

 ScHULTZ, A. H. Rassenunterschiede in der Entwicklung der Nase und in den Nasenkorpeln. 



Actes de la Soc. Helvetique des Sci. Natur. Neuch^tel (1920). 



. Observations on Colobus fetuses. Bull. Amer. Mus. Nat. Hist. (1921). 



. Sternal gland in orang-utan. Jour. Mammalogy (1921). 



. Observations on the Guiana howling monkey. Zoologica (1921). 



Scofield, C. S. See Harris, J. Arthur. 



Seares, Frederick H. Comparative tests of the 100-inch and 60-inch reflectors. Read at 



Chicago meeting, Amer. Astron. Soc. (1920); Pubs. Amer. Astron. Soc, 25th meeting, 



229-230; Pop. Astron., vol. 29, 229-271 (1921). 



. See Adams, Walter S. 



Shapley, Harlow. The scale of the universe. William Ellery Hale lecture, annual meeting, 



Nat. Acad. Sci. (1920); Bull. Nat. Research Council, No. 11 (1921). 



. Novae and variable stars. Pubs. A. S. P., vol. 33, 185-194 (1921). 



. Note on changes in the period and light-curve of the cluster variable SW An- 



dromedse. Monthly Notices, vol. 81, 208-213 (1921). 

 , and Helen Davis. Studies of magnitude in star clusters: XII. Summary of a photo- 

 metric investigation of the globular system Messier 3. Proc. Nat. Acad. Sci., vol. 6, 



486-489 (1920); Mt, WUson Communications, No. 70. 



and Mary Ritchie. Studies based on the colors and magnitudes in stellar clusters. 



18th paper: The periods and light-curves of 26 Cepheid variables in Messier 72. Astro- 

 phys. Jour., vol. 52, 232-247 (1920); Mt. Wilson Contr., No. 195. 

 Shellshear, J. L. The presence of a head cavity in a human embryo of 4 mm. Anat. Rec, 

 vol. 21, 81 (1921). 



