CONTENTS. 



Advertisement iii 



List of Officers, Members, and IJegt'iiis viii 



Article I (1438). A Comparison of the Features of tlie Eartli and tlic :\Io()n. By N. S. 

 Shaler. Published 1903. 4to, v, 130 pp., 25 phates. 



Article II (1459). On the Construction of a Silvered Glass Telescope, Fifteen and a Half 

 Inches in Aperture, and its Use in Celestial Pliotography. By IIexry 

 Draper, M. D. (Reprinted from Vol. .\IV, '"Smithsonian Contributions 

 to Knowledge," 1SG4.) Publislied 1904. 4to, iii, 55 pp. 

 On the Modern Reflecting Telescope and the Making and Testing of Optical 

 Mirrors. By George W. Ritchey. Published 1904. 4to, v, 51 pp., l;i 

 plates. 



Article III (1651). Hodgkins Fund. A Continuous Record of Atmospheric Nucleatioii. 

 By Carl Barus. Published 1905. 4to, xvi, 226 pp. 



Article IV (1692). Glaciers of the Canadian Rockies and Selkirks. By William Hit- 

 tell SiiERZER, Ph. D. Published 1907. 4to. xii. 135 pp., 43 plates. 



XI 



