(Continued from page 3 of Cover.) 



VOLUME 39. 



1. Richards, T. W., and Bonnet, F., Je. — The Changeable Hydrolytic Equilibrium of Dis- 



solved Chromic Sulphate, pp. 1-30. June, 1903. 30c. 



2. Lyman, T. — On the Prolongation of Spectral Lines, pp. 31-33. 1 pi. July, 1903. 10c. 



3. Lyman, T. — An Explanation of the False Spectra from Diffraction Gratings, pp. 37-47. 



1 pi. July, 1903. 15c. 



4. Wood, R. W. — The Anomalous Dispersion, Absorption, and Surface Color of Nitroso-dimethyl- 



aniline. pp. 49-66. 3 pis. August, 1903. 35c. 



5. Greenman. J. M. —New and otherwise Noteworthy Angiosperms from Mexico and Central 



America, pp. 67-120. September, 1903. 50c. 



6. Davenport, C. B. — Comparison of Pecten opercularis from three localities of the British Isles. 



pp. 121-159. November, 1903. 75c. 



7. Noyes, A. A., and Coolidge. W. D. — The Electrical Conductivity of Aqueous Solutions at 



Higli Temperatures. — I. Description of the Apparatus. Results with Sodium and Potas- 

 sium Chloride up to 306°. pp. 161-219. November, 1903. '80c. 



8. Castle, W. E. — The Laws of Heredity of Galton and Mendel, and some Laws governing Race 



Improvement by Selection, pp. 221-242. November, 1903. 30c. 



9. Baxter. G. P. — A Revision of the Atomic Weight of Iron. Second paper. The Analysis of 



Ferrous Bromide, pp. 243-256. November, 1903. 20c. 



