TITLES AXD ABSTRACTS OF PAPERS 151 



Natural History on the Sauropoda and other dinosaurs. In the first 

 paper the work on the great monograph of Cope's Sauropoda was dis- 

 cussed and in the second an account of Canon City genera, now supposed 

 to be synonymous, was given. These two papers were discussed by Pro- 

 fessors Schuchert and Merriam, with replies by Professor Osborn. 



CHARACTERS ASD RESTORATION OF COPE'S SAUROPODA 

 BY HENRY FAIRFIELD OSBORN 



CAMARA8AURUS A^'D AMPHICCELIAS FROM CANON CITY 

 BY HENRY FAIRFIELD OSBORN AND CHARLES C. MOOK 



Luncheon time having arrived, the Society adjourned until 2 p. m., 

 when Vice-President Stephenson called the members to order for the 

 presentation of the address of the retiring President. 



CLIMATES OF THE PAST 

 PRESIDENTIAL ADDRESS BY F. H. KNOWLTON 



{Abstract) 



Doctor Knowltou's paper was divided into two parts, the first of which was 

 devoted to the presentation of the evidence of fossil floras in their bearing in 

 the interpretation of geologic climates. It now seems to be established beyond 

 reasonable question that in the ages before the Pleistocene the climates were 

 characterized by. mildness, abundant moisture, equability, and non-zonal dis- 

 tribution. The second part of this paper was devoted to certain questions 

 arising out of an attempt to explain non-zonal climates. During and subse- 

 quent to the Pleistocene ice-invasion climate has been under direct solar con- 

 trol. If the sun had dominated earth temperatures during all geologic time 

 as it now does, it would be impossible to escape the conviction that climates 

 should have been zonal in their distribution. It is possible to explain non- 

 zonal climate in at least two ways — by heat derived from the earth itself, 

 either as persistent earth heat perhaps augmented by radio-active heat, or by 

 an affectively bigger sun. Certain astronomical objections seem to eliminate 

 the latter factor, and attention is urged to a reconsideration of the first-men- 

 tioned factor. 



President Knowlton then resumed the chair, and as a last matter of 

 business for the session called for the report of the Auditing Committee. 



REPORT OF THE AUDITING COMMITTEE 



The committee announced that the Treasurer's accounts were found 

 to be correct; whereupon it was voted by the Society that this report be 

 accepted. 



