UNITED STATES 393 



51. Studies on the germ cells of aphids, by N. M. Stevens. 1906. 8. 250. 



52. Inheritance in poultry, by C. B. Davenport. 1906. 8. $i. 



53. Egyptological researches: results of a journey in 1904, by W. Max Miiller. 



1906. 4. $2.75. 



54. Research in China, in three volumes and atlas. By Bailey Willis and 



others. 1906-07. 4 & atlas fol. v. I in 2 pts., $8 (pt. i, Descriptive 

 topography and geology; pt. 2, Petrography and zoology and Syllabary 

 of Chinese sounds); atlas of geographical and geological maps, $7; v. 

 II, $2 (Systematic geology) ; v. 3 in preparation (Paleontology). 



55. Revision of the Pelycosauria of North America, by E. C. Case. 1907. 



4- $3- 



56. Energy changes involved in the dilution of zinc and cadmium amalgams, 



by T. W. Richards and G. S. Forbes. 1906. 8. soc. 



57. The Roman comagmatic region, by H. S. Washington. 1906. 8. $i. 



58. Variation and differentiation in Ceratophyllum, by Raymond Pearl, with 



the assistance of Olive M. Pepper and Florence J. Hagle. 1907. 8. $i. 



59. The Pawnee; mythology, pt. I. Collected by G. A. Dorsey. 1906. 8. $2. 



60. Hydrates in aqueous solution, by H. C. Jones. 1907. 8. $2.50. 



61. The electromotive force of iron under varying conditions, and the effect 



of occluded hydrogen, by T. W. Richards and G. E. Behr, jr. 1906. 8. 2Sc. 



62. Condensation of vapor as induced by nuclei and ions, by Carl Barus. 



1907. 8. $1.50. 



63. The electrical conductivity of aqueous solutions, by A. A. Noyes and 



others. 1907. 8. $2.50. 



64. 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. 1907. 8. $i. 



65. Investigations of infra-red spectra. Part III Infra-red transmission 



spectra. Part IV Infra-red reflection spectra. By W. W. Coblentz. 



1906. 8. $i. (Continuation of no. 35.) 



66. High steam pressures in locomotive service, by W. F. M. Goss. 8. 



1907. $1.25. 



67. The fauna of Mayfield Cave, by A. M. Banta. 1907. 8. soc. 



68. Further researches on North American Acridiidce, by A. P. Morse. 1907. 



8. SQC. (Continuation of no. 18.) 



69. Further researches concerning atomic weights of potassium, silver, 



chlorine, bromine, nitrogen, and sulphur, by T. W. Richards and others. 

 1907. 8. soc. 



70. Selection and cross-breeding in relation to the inheritance of coat- 



pigments and coat-patterns in rats and guinea-pigs, by H. MacCurdy 

 and W. E. Castle. 1907. 8. soc. 



71. Atlas of absorption spectra, by H. S. Uhler and R. W. Wood. 1907. 



4- $1-50. 



72. Investigation of inequalities in the motion of the moon produced by the 



action of the planets ; by Simon Newcomb, assisted by F. E. Ross. 

 1907. 4. $1- 



73. Explorations in Turkestan. Archaeological and physiographical results 



of expedition of 1904, under direction of R. Pumpelly. 4. In press. 



