398 The American Geologist. June, 1902. 
XVII. The Physiological Station on Monte Rosa, H. P. Bow- 
DITCH (With lantern illustrations.) — 
XVIII. On Catalysis, - . - . James M. Crarts 
XIX. The Atomic Weight of Caesium, - -;- T. W. RicHarps 
XX. The Significance of Changing Atomic Volume, T. W. RicH- 
ARDS 
XXI. Determination of the Weight of the Vapor of Mercury at 
Temperatures Below 100 degrees, Epwarp W. Morey 
XXII. Biography of Professor William A. Rogers, ARTHUR SEARLE 
Presented by Epwarp W. Morey 
XXIII. Biographical Memoir of General J. G. Barnard, 
Henry L. Asgor 
XXIV. Biographical Memoir of General Francis A. Walker, 
Joun S. BILLiInes 
XXV. Biographical Memoir of J. S. Newberry, - C. A. WHITE 
New members were elected as follows: C. R. Van Hise, 
Geologist, Madison, Wisconsin; W. W. Campbell, Director 
of the Lick Observatory, Mt. Hamilton, California; C. Hart, 
Merriam, Biologist, Department of Agriculture, Washington ; 
Wm. Trelease, Botanist, St. Louis, Missouri; George E. Hale, 
Astronomer, Williams Bay, Wisconsin ; S. F. Emmons was 
elected Treasurer. a ol 
The investigations of the past summer (1901) have shown 
conclusively that the unaltered normal or type rock at Sudbury 
with which the deposits of nickeliferous pyrrrhotite and chal- 
copyrite are associated possesses rather exceptional character 
and interest. It belongs to the general family of gabbros, but . 
has nearly always traces of a broad ophitic or diabasic struc- 
ture, which, although rude at times, is generally quite distinct.” 
A. E. Barlow. 
