BIBLIOGRAPHY OF PUBLICATIONS. 33 



Richards, T. W. Suggestion concerning the statement of the phase rule. Jour. Amer. Chem. 



Soc, 983-989 (May 1916). 

 , and G. W. Harris. Further study of floating equilibrium. Jour. Amer. Chem. Soc, 



1000-1011 (May 1916). 

 , and J. W. Shipley. The compi'essibility of certain typical hydrocarbons, alcohols, and 



ketones. Jour. Amer. Chem. Soc, 989-1000 (May 1916). 

 , and C. Wadsworth, 3d. The density of lead from radioactive minerals. Jour. Amer. 



Chem. Soc, 221-227 (Feb. 1916). 



Density of radio-lead from pure Norwegian cleveite. Jour. Amer. Chem. 



Soc, 1658-1660 (Sept. 1916). 

 Riddle, Oscar. A note on social aspects of new data on the biology of sex. Jour. Nat. Inst. 



Social Sciences, vol. 1, 39-42 (Dec. 1915). 



. Sex control and known correlations in pigeons. Amer. Nat., vol. 50, 385-410 (July 



1916). 

 . Studies on the physiology of reproduction in birds: I. The occurrence and measure- 

 ment of a sudden change in the rate of growth of avian ova. Amer. Jour. Physiol., vol. 41, 



387-396 (Sept. 1916). 

 , with A. A. Spohn. II. On the chemical composition of the white and yellow egg 



yolk of the fowl and pigeon. Amer. Jour. Physiol., vol. 41, .397-408 (Sept. 1916). 

 . III. On the metabolism of the egg yolk of the fowl during incubation. Amer. Jour. 



Physiol., vol. 41, 409-418 (Sept. 1916). 

 , with A. A. Spohn. IV. When a gland functions for the first time, is its secretion the 



equivalent of subsequent secretions? Amer. Jour. Physiol., vol. 41, 419-424 (Sept. 1916). 

 , with Gardiner C. Basset. V. The effect of alcohol on the size of the yolk of the 



pigeon's egg. Amer. Jour. Physiol., vol. 41, 425-429 (Sept. 1916). 



with John V. Lawrence. VI. Sexual differences in the fat and phosphorus content 



of the blood of fowls. Amer. Jour. Physiol., vol. 41, 430-437 (Sept. 1916). 

 Robertson, Wm. Rees B. See Lewis, Margaret Reed. 



Roy, Arthur J. San Luis declinations. Astron. Jour., Nos. 686-687 (Mar. 1916). 

 Sabin, Florence R. On the origin of the duct of Cuvier and the cardinal veins. Anat. Rec, 



vol. IX, 115-117 (1915). 

 Scott, Katherine J. A cytological study of connective-tissue cells of animals stained vitally 



with acid azo dyes. Anat. Rec, vol. x, 263 (1916). 

 Seares, Frederick H. A simple method for determining the colors of the stars. Proc. Nat. 



Acad. Sci., vol. 2, 521 (1916); Mt. Wilson Communications, No. 33; read at San Diego 



meeting, Pac Div. A. A. A. S. (1916). 

 . Preliminary results on the color of nebulae. Proc. Nat. Acad. Sci., vol. 2, 553 (1916); 



Mt. Wilson Communications, No. 36; read at San Diego meeting, Pac. Div. A. A. A. S. 



(1916). 

 . The color of the polar sequence stars. Read at 19th meeting, Amer. Astron. Soc. 



(1916). 



. Note on the nebula N. G. C. 6010. Pubs. A. S. P., vol. 28, 122 (1916). 



. Color photographs of nebulae. Pubs. A. S. P., vol. 28, 123 (1916). 



Distribution of color in certain spiral nebulae. Read at 19th meeting, Amer. Astron. 



Soc (1916). 

 Shapley, Harlow. On the changes in the spectrum, period, and light-curve of the Cepheid 



variable RR Lyrae. Astrophys. Jour., vol. 43, 217 (1916); Mt. Wilson Contr., No. 112. 

 . Studies based on the colors and magnitudes in stellar clusters: First paper. The 



general problem of clusters. Mt. Wilson Contr., No. 115 (1916). 

 . Studies based on the colors and magnitudes in stellar clusters: Second paper. Thir- 

 teen hundred stars in the Hercules cluster (Messier 13). Mt. Wilson Contr., No. 116 



(1916). 

 . Studies based on the colors and magnitudes in stellar clusters: Third paper. A 



catalogue of 311 stars in Messier 67. Mt. Wilson Contr., No. 117 (1916). 

 . Studies of magnitudes in star clusters: I. On the absorption of light in space. 



Proc Nat. Acad. Sci., vol. 2, 12 (1916) ; Mt. Wilson Communications, No. 18. 

 . Studies of magnitudes in star clusters: II. On the sequence of spectral types in 



stellar evolution. Proc Nat. Acad. Sci., vol. 2, 15 (1916); Mt. Wilson Communications, 



No. 19. 

 . Studies of magnitudes in star clusters: III. The colors of the brighter stars in four 



globular systems. Proc. Nat. Acad. Sci., vol. 2, 525 (1916); Mt. Wilson Communications, 



No. 34; presented at 19th meeting, Amer. Astron. Soc. (1916). 

 . A short period Cepheid with variable spectrum. Proc. Nat. Acad. Sci., vol. 2, 132 



(1916) ; Mt. Wilson Communications, No. 21. 

 . Discovery of eight variable stellar spectra. Proc. Nat. Acad. Sci., vol. 2, 208 (1916); 



Mt. Wilson Communications, No. 27. 



— . A seventh variable star in the Hercules cluster. Pubs. A. S. P., vol. 27, 238 (1915). 

 — . New Hght elements and revised orbit of UZ Cygni. Pubs. A. S. P., vol. 28, 31 (1916). 



