1000 Proceedings of Scientific Socteties. September, 
croscopists was to be held in Chicago, beginning Aug. 7 and con- 
tinuing four days. l 
— We have, for lack of space, failed to notice several recent geo- _ 
logical papers of interest. These are Mr. G. K. Gilbert’s Contribu- 
tions to the History of Lake Bonneville, extracted from the — 
annual report of the Director of the U. S. Geological Survey, 
1880-81. It is finely illustrated and gives the results of s 
seasons’ explorations. Professor W. M. Davis publishes in the 
Bulletin of the Museum of Comparative Zoology, Vol. vu, a 
well illustrated paper on the relations of the Triassic traps and 
sandstones of the Eastern United States; also a second paper on 
the folded Helderberg limestones east of the Catskills, with nu- — 
merous diagrams, 
— A monument to the memory of the celebrated naturalist 
and physio-philosopher, Oken, has been erected at Offenburg. 
Visitors to the University grounds at Jena will remember seeing 
his bust there, which has been on exhibition for many years. 
:0; 
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
was correctly pitched, and a series gave a complete octave : 
together with the ninth, eleventh, and twelfth. Mr. Ca io 
gued from these facts that the Aztecs were acquainted k js a 
prove that those who made the instrument possessed the vee 
knowledge to produce it. Mr. Skinner showed some coco 
the Cecropia moth gathered from the elder. Those taken ™ 
near the base of the shrub were of stouter form than pepe 
ered from higher up, and always proved to be females, hk 
slimmer cocoons found on the higher branches always tu 
male. ; of recent 
April 12.—Professor E. D. Cope gave particulars Ci ftu 
paleontological discoveries in Brazil. Brazil consisted © 
