BIBLIOGRAPHY OF PUBLICATIONS. 43 



Pease, Francis G., Photographs of nebula with the 60-inch reflector 1911-1916. Astrophys. 



Jour., vol. XLVi, No. 24-55 (1917); Mt. WUson Contr., No. 132. 



. Mt. Wilson's 100-inch reflector. Sci. Amer., vol. 117, 100 (Aug. 11, 1917). 



, and Harlow Siiapley. On the distribution of stars in twelve globular clusters. 



Astrophys. Jour., vol. 45, 225-243 (1917); Mt. Wilson Contr., No. 129. 

 , . Axes of symmetry in globular clusters. Proc. Nat. Acad. Sci., vol. 3, 9&-i01 



(1917) ; Mt. Wilson Communications, No. 39. 



Note on the elliptical form of Messier 13. Read at 20th meeting, Amer. Astron. 



Soc. (1916); [Abstract] Pop. Astron., vol. 25, 374 (1917). 



Peters, W. J. See Bauer, L. A. 



PoPENOE, W. See Harris, J. Arthur. 



Pratt, H. S. Trematodes of the loggerhead turtle {Caretta caretta) of the Gulf of Mexico. 

 Archives de Parisitologie, tome 16, 411-427, pis. 4, 5, 13 figs. (1914). 



Richards, T. W. Atoms. Youth's Companion (Mar. 20, 1917). 



, and H. S. Davis. Improvements in calorimetric combustion, and the heat of combus- 

 tion of toluene. Proc. Nat. Acad. Sci., vol. 3, 50 (Jan. 1917); Jour. Amer. Chem. Soc, 

 vol. XXXIX, 341 (Mar. 1917). 



, and N. F. Hall. Attempt to separate the isotopic forms of lead by fractional crystalli- 

 zation. Jour. Amer. Chem. Soc, vol. xxxix, 531 (Apr. 1917); Proc. Nat. Acad. Sci., vol. 3, 

 339 (May 1917). 



, and W. B. Meldrum. The melting points of the chlorides of hthium, rubidium, and 



caesium, and the freezing points of binary and ternary mixtures of these salts, including also 

 potassium and sodium chloride. Jour. Amer. Chem. Soc, vol. xxxix, 1816 (Sept. 1917). 



, and H. W. Richter. On the absence of thermal hysteresis in the copper-constantan 



thermoelement between 30° and 100° C. Jour. Amer. Chem. Soc, vol. xxxix, 231 (Feb. 

 1917). 

 -, and C. Wadsworth, 3d. Further study of the atomic weight of lead of radio-active 



origin. Jour. Amer. Chem. Soc, vol. xxxviii, 2613 (Dec. 1916); Proc Nat. Acad. Sci., vol. 



2, 694 (Dec. 1916). 

 Richter, H. W. See Richard, T. W. 

 Riddle, Oscar. Size and length relations of the right and left testes of pigeons in health and 



disease. Anat. Rec, vol. xi, 87-102 (Oct. 1916). 



. The control of the sex ratio. Jour. Wash. Acad. Sci., vol. vii, 319-356 (June 4, 1917). 



. The theory of sex as stated in terms of results of studies on pigeons. Science, n. s., 



vol. XLVI, 19-24 (July 6, 1917). 

 -, and J. V. Lawrence. Studies on the physiology of reproduction in birds: VII. Varia- 



tions in the chemical composition of reproductive tissues in relation to functional activity. 



Amer. Jour. Physiol., vol. xlii, 151-162 (Dec. 1916). 

 RrrzMAN, E. G., and C. B. Davenport. Family performances as a basis for selections in sheep. 



Jour. Agri. Research, vol. x, 93-97 (Jxily 1917). 

 Sabin, Florence R. The method of growth of the lymphatic system. The Harvey Lectures, 



series xi, 124-145 (1915-1916). 

 . The method of growth of the lymphatic system. Science, n. s., vol. xliv, 145-158 



(1916). 

 ScHULTZ, Adolf H. Ein paariger Elnocken am Unterrand der Squama occipitalis. Anat. Rec, 



vol. XII, 357-362, 2 figs. (1917). 

 ScoTT, W. J. M. Experimental mitochondrial changes in the pancreas in phosphorous poisoning. 



Amer. Anat., vol. xx, 237-251, 1 pi., 7 figs. (1916). 

 Seares, Frederick H. A determination of the galactic condensation from certain zones of the 



Astrographic Catalogue. Astrophys. Jour., vol. 46, 117-137 (1917); Mt. Wilson Contr., 



No. 135. 

 . The color of the standard polar stars determined by the method of exposure-ratios. 



Proc Nat. Acad. Sci., vol. 3, 29 (1917); Mt. Wilson Communications, No. 38. 

 . Photographic magnitudes of stars in the Selected Areas of Kapteyn. Proc. Nat. Acad. 



Sci., vol. 3, 188-191 (1917); Mt. Wilson Communications, No. 42. 

 . Preliminary note on the distribution of stars with respect to the galactic plane. Proc. 



Nat. Acad. Sci., vol. 3, 217-222 (1917); Mt. Wilson Commimications, No. 43. 

 . Further evidence on the concentration of the stars toward the galaxy. Proc Nat. 



Acad Sci., vol. 3, 558-562 (1917) ; Mt. Wilson Communications, No. 49. 

 . Magnitudes and color of Barnard's proper-motion star, 17''53'"44' +4°27 ! 8 (1916) . Pubs. 



A. S. P., vol. 28, 280 (1916). 



. The Mount Wilson Solar Observatory. Pubs. A. S. P., vol. 29, 155 (1917). 



-, Adriaan van Maanen, and Ferdinand Ellerman. The location of the sun's magnetic 



axis. Read at 21st meeting, Amer. Astron. Soc. (1917). 

 Shaplby, Harlow. Studies based on the colors and magnitudes in stellar clusters. [Abstract of 

 Mt. Wilson Contr., Nos. 115, 116, and 117.] Astrophys. Jour., vol. 45, 118 (1917). 



