REPORT OF THE PRESIDENT, I912. 27 



PUBLICATIONS. 



The publication of seventeen volumes* has been authorized by the Execu- 

 B , ,. . . . tive Committee during the year at an aggregate estimated 



Publications Author- r ^ ^ mirn- i- ., 



ized and Issued cost 01 $36,250. The followmg list gives the titles and 

 During the Year, names of the authors of the publications issued during the 

 year. It includes 23 volumes, with an aggregate of 3,981 octavo pages and 

 2,044 quarto pages. Thirty-two additional volumes are now in press. 



List of Publications issued during the year. 



Year Book No. 10, 191 1. Octavo, xvi + 296 pages, 9 plates. 



Index Medicus, Second Series, vol. 9, 191 1. Octavo, 1585 pages. 



No. 74. Sommer, H. Oskar. Vulgate Version of the Arthurian Romances. Edited 

 from MSS. in the British Museum. Quarto. Vol. v. Le Livre de Lancelot 

 del Lac, Part III, 474 pages. 



No. 85. Hasse, Adelaide R. Index of Economic Material in the Documents of the 

 States of the United States. Prepared for and under the direction of the 

 Department of Economics and Sociology of the Carnegie Institution of 

 Washington. Separate volumes for each State. Quarto. Ohio. Two vol- 

 umes, 1 1 36 pages. 



No. 88. Bjerknes, V., Th. Hesselberg, and O. Devik. Dynamic Meteorology and 

 Hydrography. Part II, Kinematics. Quarto, ix -|- 175 pages, 113 text fig- 

 ures. Atlas of 60 charts. 



No. 146. Case, E. C Revision of the Amphibia and Pisces of the Permian of North 

 America. Quarto, 184 pages, 32 plates, 56 text figures. 



No. 149. Barus, Carl. The Production of Elliptic Interferences in Relation to Inter- 

 ferometry. Part II. Octavo, vi H- 79-168 pages, text figures 34-64. 



No. 150. Learned, Marion D. Guide to the Manuscript Material relating to American 

 History in the German State Archives. Octavo, vii -{■ 352 pages. 



No. 152. Nichols, Edward L., and Ernest Merritt. Studies in Luminescence. Octavo, 

 226 pages, 190 text figures. 



No. 153. King, Arthur S. The Influence of a Magnetic Field upon the Spark Spectra 

 of Iron and Titanium. Quarto, 66 pages, 3 text figures. 



No. 156. Osborne, Thomas B., and Lafayette B. Mendel. Feeding Experiments with 

 Isolated Food-Substances. Part II. Octavo, pages in -{■ 55-138, text fig- 

 ures XXII-CXXIX. 



No. 158. Wright, F. E. The Methods of Petrographic-Microscopic Research: Their 

 Relative Accuracy and Range of Application. Octavo, 204 pages, 11 plates, 

 118 text figures. 



No. 160. Jones, Harry C, and W. W. Strong. The Absorption Spectra of Solutions 

 of Comparatively Rare Salts, including those of Gadolinium, Dysprosium, 

 and Samarium ; the Spectrophotography of Certain Chemical Reactions, and 

 the Effect of High Temperature on the Absorption Spectra of Non-aqueous 

 Solutions. Octavo, vni + 112 pages, 67 plates. 



No. 162. Mayer, Alfred G. Ctenophores of the Atlantic Coast of North America. 

 Octavo, 58 pages, 17 plates, 12 text figures. 



No. 164. Coblentz, W. W. A Physical Study of the Firefly. Octavo, 47 pages, i plate, 

 14 text figures. 



No. 166. Benedict, Francis G. The Composition of the Atmosphere with Special Ref- 

 erence to its Oxygen Content. Octavo, i plate, i text figure, 115 pages. 



No. 167. Benedict, Francis G., and Walter G. Cady. A Bicycle Ergometer with an 

 Electric Brake. Octavo, 44 pages, 16 text figures. 



No. 170. Jones, Harry C. The Electrical Conductivity, Dissociation, and Temperature 

 Coefficients of Conductivity (from Zero to Sixty-five Degrees) of Aqueous 

 Solutions of a Number of Salts and Organic Acids. Octavo, rv + 148 

 pages. 



* The names of the authors of these volumes are given in the financial statement on 

 page 14. 



