{Continued from pn-f/e •'»' of f over, ■ 



VOLUME 3U 



1. Richards, T. \\\, and Bonnet, v., Jr. The Changeable Hydrolytic Equilibrium of Di— 



solved Chromic Sulphate, pp. 1-30. June, 11103. 35c. 



2. LriHAN, T. — Ou the Prolongation of Spectral Lines, pp. 31-35. 1 pi. July, 1003. 10c. 



o. Lyman, T. — An Explanation of the False Spectra from Diffraction Gratings, pp. 37-17. 



1 pi. July, 1903. 15c. 

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



aniline. pp. 49-60. 3 pis. August, 1903. 35c. 

 r>. Gkeenman, 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. Notes, A. A., and Coolidge, W. D. — The Electrical Conductivity of Aqueous Solutions at 



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

 sium Chloride up to 300 : '.. pp. 161-219. November, 1903. 80c. 



