REPORT OF THE PRESIDENT, 1921. 27 



Washington, H. S. Le rioliti di Lipari. BoU. Soc. Geol. Ital., vol. 39, 141-159 (1920). 

 . The chemistry of the earth's crust. Jour. Franklin Inst., vol. 190, 757-815 (1920) 



(Reprinted, Smithsonian Misc. Coll., 1921). 



. A meteor fall in the Atlantic. Science, n. s., vol. 53, 90-91 (1921). 



. The problems of volcanology. Proc. Nat. Acad. Sci., vol. 6, 583-591 (1920). 



. Note on crucibles used in rock analysis. Jour. Wash. Acad. Sci., vol. 11, 9-13 (1921). 



. Aphthitalite from Kilauea. Amer. Mineral., vol. 6, 121-125 (1921). 



, and H. E. Merwin. Note on augite from Vesuvius and Etna. Amer. Jour. Sci., vol. 



1, 20-30 (1921). 

 Webster, L. T. See Lewis, W. H. 

 Weech, a. a. See Shipley, P. G. 

 Weed, L. H. The cells of the arachnoid. Johns Hopkins Hosp. Bull., vol. 31, 343-350 (1921). 



, and Walter Hughson. The skull as a closed box. Anat. Rec, vol. 21, p. 88 (1921). 



Wesson, M. B. Anatomical, embryological, and physiological studies of the trigone and neck 



of the bladder. Jour. Urol., vol. 4, 279-315 (1920). 



. See Young, H. H. 



White, W. P. Unification of symbols and diagrams. Science, n. s., vol. 51, 414-417 (1920). 

 . The latent heats of fusion of nickel and monel metal. Chem. and Met. Eng., vol. 



25, 17-21 (1921). 

 Wieland, George R. Recedent lake shores of the Cretaceous. Science, n. s., vol. 52, 537-538 



(Dec. 3, 1920). 



. Monocarpy and pseudomonocarpy in the Cycadeoids. Amer. Jour. Bot., vol. 8, 218- 



230, pis. ix-xii (Apr. 1921). 

 . Paleobotany as viewed by two geologists. Science, n. s., vol. 53, 437-439 (May 6, 



1921). 



Two new North American Cycadeoids. Can. Geol. Survey, Bull. No. 33, 79-85, pis. 



ix-xii (Sept. 14, 1921). 

 Wilber, D. T. See Nichols, E. L. 

 Williams, J. W. A critical analj'sis of twenty-one years' experience with Caesarean section. 



Johns Hopkins Hosp. Bull. vol. 32, 173-184 (1921). 

 Williamson, E. D. See Adams, L. H. 



Wilson, Ralph W. Orbit of /3 Doradus. (Abstract) Pop. Astron., vol. 29 (Feb. 1921). 

 . On the period eccentricity relation in binary systems. Astron. Jour., No. 786 (May 



1921). 



, and C. M. Huffer. Orbit of 1 Carina. (Abstract) Pop. Astron. vol. 29 (Feb. 1921). 



Orbit of e Sagittarii. (.\bstract) Pop. Astron., vol. 29 (Feb. 1921). 



WiSLOCKi, G. B. The fate of true solutions (phenolsulphonephthalein) and colloids (trypan blue) 

 injected into the mammalian embryo. Johns Hopkins Hosp. Bull., vol. 32, 93-96 (1921). 



. Experimental observations on bone-marrow. Johns Hopkins Hosp. Bull., vol. 32, 



132-134 (1921). 



Observations upon the behavior of carbon granules injected into pregnant animals. 



Anat. Rec, vol. 21, 29-33 (1921). 

 Wright, Fred. E. War-time production of optical munitions. (Papers on Optical Glass, No. 



33.) Army Ordnance, vol. 1, 247-251 (1921). 

 . The angular deflections produced on transmitted light rays by slightly incorrect inter- 

 facial angles of reflection prisms. (Papers on Optical Glass, No. 34.) Jour. Opt. Soc. Amer., 



vol. 5, 193-204 (1921). 

 . Cords and surface-markings in glassware. (Papers on Optical Glass, No. 35.) Jour. 



Amer. Ceram. Soc, vol. 4, C55-661 (1921). 

 . Note on the determination of the relative expansion of glasses. (Papers on Optical 



Glass, No. 36.) Jour. Opt. Soc. Amer., vol. 5. 453-460 (1921). 

 . On tracing rays of light through a reflecting prism with the aid of a meridian projection 



plot. (Papers on Optical Glass, No. 37.) Jour. Opt. Soc. Amer., vol. 5, 410-419 (1921). 



. Dispersion in optical glasses: III. (Papers on Optical Glass, No. 38.) Jour. Opt. 



Soc Amer., vol. 5, 389-397 (1921). 



The manufacture of optical glass and of optical systems: A war-time problem. 



(Papers on Optical Glass, No. 40.) Ordnance Dept. Doc. No. 2037, 309, 94 illus. (1921). 

 Wyckoff, Ralph W. G. An outline of the application of the theory of space groups to the study 



of the structure of crystals. Amer. Jour. Sci., vol. 1, 127-137 (1921). 



. The crystal structure of magnesium oxide. Amer. Jour. Sci., vol. 1, 138-152 (1921). 



. The determination of the structure of crystals. Jour. Franklin Inst., vol. 191, 199-230 



(1921). Reprinted, Smithsonian Misc. Coll. (1921). 



. The wave-lengths of X-rays. Jour. Wash. Acad. Sci., vol. 11, 366-373 (1921). 



The crystal structure of alabandite (MnS). Amer. Jour. Sci., vol. 2, 239-249 (1921). 



Young, H. H., and M. B. Wesson. The anatomy and surgery of the trigon. Arch. Surg., vol. 

 3, 1-37 (1921). 



