22 PROCEEDINGS OF THE BOSTON-CAMBRIDGE MEETING 



RELATIVE WORK OF THE TWO FALLS OF NIAGARA 

 BY J. W. SPENCER 



Given extemporarily ; 20 minutes. 



At 5 o'clock the section adjourned. 



The main division of the Society met^ under the chairmanship of 

 Vice-President Adams^ Tuesday afternoon, in the Nash Botanical Lec- 

 ture Eoom of the Museum, and began the consideration of the papers in 

 physical and structural geology. 



NATURAL BRIDGES OF NORTH AMERICA, WITH A DISCUSSION OF THEIR 



ORIGIN 



BY HERDMAlSr F. CLELAND 



Presented extemporaneously; illustrated with lantern slides; 20 min- 

 utes. Discussed by H. C. Hovey and J. W. Spencer. 



GEOLOGICAL SUGGESTIONS DERIVED FROM A NEW ARRANGEMENT OF THE 



ELEMENTS 



BY B. K. EMERSON 



Given extemporaneously; illustrated with diagrams; 30 minutes. 



NEW LIGHT ON THE GEOLOGY OF THE WASATCH MOUNTAINS 

 BY ELIOT BLACK WELDER 



Presented extemporaneously; illustrated with lantern slides; 35 min- 

 utes. Discussed by S. F. Emmons, Bailey Willis, A. W. Grabau, Arthur 

 Keith, and the author. 



HAWAIIAN VOLCANOES 

 BY REGINALD A. DALY 



Presented without notes ; illustrated with lantern slides ; 25 minutes. 

 Discussed by T. A. Jaggar, Jr. 



The main section adjourned at 5 o'clock. 



Tuesday evening the Society met in the rooms of the Technology 

 T^nion and participated in a smoker as the guests of the Department of 

 Geology of the Massachusetts Institute of Technology. The attendance 

 was large and the occasion was most enjoyable. 



