CONTENTS. 



Page 

 I. The Changeable Hydrolytic Equilibrium of Dissolved Chromic 



Sulphate. By Thkodoke William Richards and 



Frederic Bonnet, Jr 1 



II. On the Prolongation of Spectral Lines. By Theodore Lyman 31 



III. An Explanation of the False Spectra from Diffraction Gratings. 



By Theodore Lyman 37 



IV. The Anomalous Dispersion, Absorption, and Surface Color of 



Nitroso-dimethyl-aniline. By R. W. Wood 49 



V. New and otherwise Noteworthy A ngiosperms from Mexico and Central 



America. By J. M. Greenman G7 



VI. Quantitative Studies in the Evolution of Pecten. — III. Compari- 

 son of Pecten opercularis from three Localities of the British 

 Isles. By C. B. Davenport 121 



VII. The Electrical Conductivity of Aqueous Solutions at High Tem- 

 peratures. I. — Description of the Apparatus. Results with 

 Sodium and Potassium Chloride up to 306°. By Arthur A. 

 Noyes and William D. Coolidge 161 



VIII. The Laws of Heredity of Gallon and Mendel, and some Laws 



governing Race Improvement by Selection. By W. E. Castle 221 



IX. A Revision of the Atomic Weight of Iron. Second Paper. — The 



Analysis of Ferrous Bromide. By Gregory Pail Baxter 243 



X. The Color Changes in the Skin of the so-called Florida Chameleon, 



Anolis carolinensis Cuv. \)y Frank C. Carlton . . . 257 



