REPORT OF THE PRESIDENT, IQG/. 33 



No. 55. A Revision of the Pelycosauria of North America. By E. C. Case. Quarto, 



176 pages, 35 plates, 73 text figures. 

 No. 56. The Energy Changes involved in the Dilution of Zinc and Cadmium Amalgams. 



By T. W. Richards and G. S. Forbes. Octavo, 68 pages, 10 figures. 

 No. 58. Variation and Differentiation in Ceratophyllum. By Raymond Pearl. Octavo, 



136 pages, 2 plates, 26 text figures. 

 No. 59. The Pawnee: Mythology (part i). By G. A. Dorsey. Octavo, 546 pages. 

 No. 60. Hj'drates in Aqueous Solution. By Harry C. Jones, assisted by F. H. Getman, 



H. P. Bassett, L. McMaster, and H. S. Uhler. Octavo, viii + 264 pages, 35 



plates, 76 text figures. 

 No. 61. The Electromotive Force of Iron under Varying Conditions, and the Effect of 



Occluded Hydrogen. By T. W. Richards and G. E. Behr. Octavo, 43 pages, 



6 figures. 

 Condensation of Vapor as induced by Nuclei and by Ions. By Carl Barus. 



Octavo, X + 164 pages, 66 figures. 

 The Electrical Conductivity of Aqueous Solutions. By Arthur A. Noyes, 



assisted by W. D. Coolidge, A. C. Melcher, H. C. Cooper, Yogoro Kato, R. B. 



Sosman, G. W. Eastman, C. W. Kanolt, and W. Bottger. Octavo, vi + 352 



pages, 20 figures. 

 Variation and Correlation in the Crayfish, with special reference to the Influence 



of Differentiation and Homology of Parts. By Raymond Pearl and A. B. 



Clawson. Octavo, 70 pages, 8 figures. 

 Investigations of Infra-red Spectra. III. Infra-red Transmission Spectra. 



IV. Infra-red Reflection Spectra. By W. W. Coblentz. Octavo, 128 pages, 



93 figures. 

 The Fauna of Mayfield's Cave. By A. M. Banta. Octavo, 114 pages, 2 plates, 



13 text figures. 

 Further Researches on North American Acridiidae. By A. P. Morse. Octavo, 



54 pages, 10 plates, i text figure. 

 Further Researches concerning Atomic Weights of Potassium, Silver, Chlorine, 



Bromine, Nitrogen, and Sulphur. By T. W. Richards, assisted by Arthur 



Staehler, G. S. Forbes, Edward Mueller, and Grinnell Jones. Octavo, 88 



pages, 4 figures. 

 No. 70. Selection and Cross-breeding in relation to the Inheritance of Coat-pigments 



and Coat -patterns in Rats and Guinea-pigs. (Paper No. 8, Station for Ex- 

 perimental Evolution.) By Hansford MacCurdy and W. E. Castle. Octavo, 



50 pages, 2 plates, 5 text figures. 

 No. 71. Atlas of Absorption Spectra. By H. S. Uhler and R. W. Wood. Quarto, 59 



pages, 26 plates, 7 text figures. 

 No. 72. Investigation of Inequalities in the Motion of the Moon produced by the Action 



of the Planets. By Simon Newcomb. Quarto, viii + 160 pages. 

 No. 76. The Compressibilities of the Elements, and Their Periodic Relations. By T. W. 



Richards. Octavo, 67 pages, 8 figures. 

 No. 80. Conductivity and Viscosity in Mixed Solvents. By Harry C. Jones, assisted by 



C. F. Lindsay, C. G. Carroll, H. P. Bassett, E. C. Bingham, C. A. Rouiller, 



L. McMaster, and W. R. Veazey. Octavo, v -f 235 pages, 103 figures. 

 No. 81. Mutations, Variations, and Relationships of the Oenotheras. (Paper No. 9, 



Station for Experimental Evolution.) By D. T. MacDougal, A. M. Vail, and 



G. H. Shull. Octavo, 92 pages, 22 plates, 73 text figures. 

 No. 83. Guide to the Materials for American History in Cuban Archives. By Luis 



Marino Perez. Octavo, x -f 142 pages. 

 No. 84. The Proteins of the Wheat Kernel. By Thomas B. Osborne. Octavo, 119 



pages. 

 No. 85. Index of Economic Material in the Documents of the States of the United 



States. Prepared for and under the direction of the Department of Econom- 

 ics and Sociology of the Carnegie Institution of Washington. Separate 



volume for each State. By Adelaide R. Hasse. Quarto. 

 (Maine), (1820-1904), 95 pages. 

 (New Hampshire), (1789-1904), 66 pages. 

 (Vermont), (1789-1904), 71 pages. 



3-YB 



