REPORT OF THE PRESIDENT, 1921. 17 



List of publications issued during the year. 



Year Book, No. 19, 1920. Octavo, xxi4-424 pages, 2 platea, 5 figures. 

 Index Medicus, Second Series, Vol. 18, 1920. Octavo, 1,131 pages. 



Ninth edition of an illustrated pamphlet on the Scope and Organization of the Carnegie Insti- 

 tution of Washington. Octavo, 59 pages, 1 plate, 1 map, 29 figures. 

 No. 185, Hasse, Adelaide R. Index to United States Documents relating to Foreign Affairs, 



1828-1861. In three parts. Quarto, Part III, R to Z, 647 pages. 

 No. 214. Clark, H. L. The Echinoderm Fauna of Torres Strait: Its Composition and its 

 Origin. (Paper from Department of Marine Biology of the Carnegie Institu- 

 tion of Washington. Vol. X.) Quarto, viii+233 pages, 40 plates. 

 No. 258. Rowe, L. S. Federal System of the Argentine Republic. Octavo, vii+ 161 pages. 

 No. 275. Contributions to Embryology, No. 56. Vol. XII. Quarto, 364 pp, 24 pis., 6 figs. 

 Mall, F. P., and A. W. Meyer. Studies on Abortuses: A Survey of the Pathologic 

 Ova in the Carnegie Embryological Collection. 

 No. 276. Contributions to Embrj'ology, Nos. 57 to 64. Vol. XIII. Quarto, 146 pages, 15 

 plates, 25 figures, 1 chart. 

 Cash, James R. Lymphatics in the Stomach of the Embryo Pig. (Contribution 



No. 57.) 3 plates, 3 figure?, 

 Reichert, F. L. On the Fate of the Primary Lymph-Sacs in the Abdominal Region of 

 the Pig, and the Development of Lymph-Channels in the Abdominal and Pelvic 

 Regions. (Contribution No. 58.) 5 figures. 

 Jenkins, George B. Relative Weight and Volume of the Component Parts of the 

 Brain of the Human Embryo at Different Stages of Development. (Contri- 

 bution No. 59.) 12 figures, 1 chart. 

 Corner, George W. Abnormalities of the Mammalian Embryo occurring before 



Implantation. (Contribution No. 60.) 2 plates, 1 figure. 

 Spaulding, M. H. Development of the External Genitalia in the Human Embryo. 



(Contribution No. 61.) 4 plates, 2 figures. 

 Wislocki, George B. Further Experimental Studies on Fetal Absorption. (Con- 

 tribution No. 62.) 



III. Behavior of the Fetal Membranes and Placenta of the Guinea-Pig toward 

 Trypan-BIue injected into the Maternal Blood-Stream. 



IV. Behavior of the Placenta and Fetal Membranes of the Rabbit toward 

 Tr>'pan-Blue injected into the Maternal Blood-Stream. 1 plate. 



Wislocki, George B., and J. A. Key. Distribution of Mitochondria in the Placenta. 



(Contribution No. 63.) 1 plate. 

 Corner, G. W. Cyclic Changes in the Ovaries and Uterus of the Sow, and Their 



Relation to Mechanism of Implantation. (Contribution No. 64.) 4 plates, 



2 figures. 

 No. 284. Livingston, Burton E., and Forrest Shreve. Distribution of Vegetation in the United 



States as related to Climatic Conditions. Octavo, xvi+590 pages, 73 plates, 



74 figures, 152 tables. 

 No. 299. Burnett, E. C. Letters of Members of the Continental Congress. Vol. 1: August 29, 



1774, to July 4, 1776. Octavo, lxvi+572 pages. 

 No. 300. Ivens, Walter G. A Grammar and Dictionary of the Lau Language. Octavo, 64 



pages, 3 plates. 

 No. 301. Sturtevant, A. H. The North American Species of Drosophila. Octavo, iv-{-150 



pages, 3 plates, 49 figures. 

 No. 302. Benedict, F. G., and F. B. Talbot. Metabolism and Growth from Birth to Puberty. 



Octavo, VI-H213 pages, 55 figures. 

 No. 303. Carpenter, Thome M. Tables, Factors, and Formulas for computing Respiratory 



Exchange and Biological Transformations of Energy. Octavo, 123 pages, 33 



tables. 

 No. 305. Banta, Arthur M. Selection in Cladocera on the Basis of a Physiological Character. 



Octavo, 170 pages, 19 figures. 

 No. 307. MacDougal, D. T. Growth in Trees. Octavo, 41 pages, 16 figures. 

 No. 313. Hall, Harvey M., and Frances L. Long. Rubber-content of North American Plants. 



Octavo, 65 pages, 3 plates. 

 No. 315. Clements, F. E. Aeration and Air-Content: The Role of Oxygen in Root Activity. 



Octavo, 183 pages. 



