24 CARNEGIE INSTITUTION OF WASHINGTON. 



Doan, C. A. The capillaries of the bone marrow of the adult pigeon. Johns Hopkins Hosp. 



Bull., vol. 33, 222-226 (1922). 

 Duncan, John C. The spectroscopic binary Boss 3644 Virginis. Astrophys. Jour., vol. 54, 



226-228 (1921); Mt. Wilson Contr., No. 212. 

 . Changes observed in the Crab Nebula in Taurus. Proc. Nat. Acad. Sci., vol. 7, 179-180 



(1921); Mt. Wilson Communications, No. 76. 



Changes in the spectrographic elements of y Sagittarii. Read at the Swarthmore 



meeting, Amer. Astron. Soc. (1921); (Abstract) Pop. Astron., vol. 30, 107-108 (1922). 

 Dunham, Theodore jr. See Richards, Theodore W. 

 Durham, G. B. See Harris, J. Arthur. 

 Duvall, C. R. See Sverdrup, H. U. 



Ellerman, Ferdinand. The sun. Pubs. A. S. P., vol. 34, 11-23 (1922). 



Eskola, Pentti. On contact phenomena between gneiss and limestone in western Massachu- 

 setts. Jour. Geol., vol. 30, 265-294 (1922). 

 Farnham, M. E. See Blakeslee, A. F. 

 Felton, L. D. A colorimetric method for determining the hydrogen-ion concentration of small 



amounts of fluid. Jour. Biol. Chem., vol. 46, 299-305 (1921). 



. See Lewis, M. R. 



Fleming, J. A. Latest annual values of the magnetic elements at observatories. Terr. Mag., 



vol. 26, 146-149 (Dec. 1921). 



. See Bauer, L. A. 



Fox, Edward L. See Benedict, Francis G. 



Gingrich, C. H. The variable double star X Ophiuchi. Astrophys. Jour., vol. 56, 34-40 



(1922) ; Mt. Wilson Contr., No. 238. 

 . Parallaxes of stars in the region of B. D. +31° 643. Astrophys. Jour., vol. 56 (1922); 



Mt. Wilson Contr., No. 239. 



. See Van Maanen, Adriaan. 



Govaerts, Albert. See Harris, J. Arthur. 



Guttmacher, M. S., and A. F. Guttmacher. Morphological and physiological studies on the 



musculature of the mature Graafian follicle of the 60W. Johns Hopkins Hosp. Bull., vol. 



32, 394-398 (1921). 

 Hale, George E. Invisible sun-spots. Proc. Nat. Acad. Sci., vol. 8, 168-170 (1922); Mt. 



Wilson Communications, No. 80. 



. The new heavens. Scribner (1922). 



. Cosmic crucibles. Scribner's Mag., vol. 70, 387-401 (1921). 



. The depths of the universe. Scribner's Mag., vol. 71, 689-704 (1922). 



. A summary of the year's work at Mount Wilson. Pubs. A.S. P., vol. 33, 291-312 (1921). 



. Note on invisible sun-spots. Pubs. A. S. P., vol. 34, 59-61 (1922). 



. The probable absence of a measurable electric field in sun-spots. Read at Middletown 



meeting, Amer. Astron. Soc. (1921); (Abstract) Pop. Astron., vol. 29, 625-626 (1921). 



. Astrophysical aspects of the Zeeman effect. Physica, vol. 1, 250-254 (1921). 



. Invisible sun-spots. Monthly Notices, vol. 82, 168-169 (1922). 



A joint investigation of the constitution of matter and the nature of radiation. Address 



at dedication of Norman Bridge Laboratory of Physics of the California Institute of Tech- 

 nology (1922). 



Harris, J. Arthur. The correlation between monthly and annual egg production in the pullet 

 year in White Wyandotte fowl. Poultry Science, vol. 1, No. 6, 196-202 (Aug.-Sept. 1922). 



, W. F. Kirkpatrick, and A. F. Blakeslee. The prediction of annual egg production 



from the records of limited periods. Proc. Nat. Acad. Sci., vol. 7, 213-219 (July 1921). 



, Edmund W. Sinnott, John Y. Pennypacker, and G. B. Durham. The vascular 



anatomy of hemitrimerous seedlings of Phaseolus vulgaris. Amer. Jour. Bot., vol. 8, 375- 

 381 (Oct. 1921). 



, Edmund W. Sinnott, John Y. Pennypacker, and G. B. Durham. The interrelation- 

 ship of the number of the two types of vascular bundles in the transition zone of the axis of 

 Phaseolus vulgaris. Amer. Jour. Bot., vol. 8, 425-432 (Nov. 1921). 



, and H. R. Lewis. The interrelationship of the egg records of various periods during the 



first and second year of the White Leghorn fowl. Poultry Science, vol. 1, No. 4, 97-107 

 (Apr-May 1922). 



, . The correlation between the monthly record of the first year and the annual 



record of the second year with special reference to culling for the second year production. 

 Poultry Science, vol. 1, No. 5, 145-150 (June- July 1922). 



The "winter cycle" in the fowl. Science, n. s., No. 6, 230-231 (1922). 



— , and Albert Govaerts. Note on assortative mating in man with respect to head sire 



and head form. Amer. Nat., vol. 56, 381-383 (July-Aug. 1922). 

 Hartman, C, and C. H. Heuser. A black background for photographing objects in a liquid 



medium. Anat. Rec, vol. 24 (1922). 

 Harvey, E. N. Studies on bioluminescence: XIV. The specificity of luciferin and lucif erase. 



Jour. Gen. Physiol., vol. 4, 285-295 (1922). 



