32 PROCEEDINGS OF THE BOSTON-CAMBRIDGE MEETING 



petrologic, mineralogic^ and economic subdivision of the program, the 

 first paper being read from manuscript. It was 



GEOLOGIC THERMOMETRY 

 BY FEED E. WRIGHT 



Fifteen minutes. Eemarks upon the paper were made by J. F. Kemp, 

 E. A. Daly, A. C. Lane, and E. T. Wherry. 

 Then was presented extemporaneously 



SOME MINERAL RELATIONS FROM THE LABORATORY VIEWPOINT 

 BY ARTHUR L. DAY 



Twenty minutes. Discussion was postponed to the afternoon session, 

 and the Society adjourned at 12.15 for luncheon, convening again at 

 2 o'clock, when the discussion of Doctor Day's paper was taken up and 

 participated in by A. C. Gill, Whitman Cross, and the author. 



After this 



ORIGIN OF THE ALKALINE ROCKS 



BY REGINALD A. DALY . 



was read in abstract from the complete manuscript, 25 minutes, and was 

 discussed by J. F. Kemp, Whitman Cross, H. P. Cushing, A. E. Barlow, 

 W. G. Miller, and the author. 



Then was presented extemporaneously 



THE COMPLEX OF ALKALINE IGNEOUS ROCKS AT CUTTINGSVILLE, VERMONT 



BY J. W. EGGLESTON^^ 



illustrated with diagrams and specimens. The paper was discussed by 

 J. E. Wolff, F. E. Wright, and J. A. Dresser. 

 The next paper 



OBSIDIAN FROM HRAFNTINNUHRYGGUR, ICELAND 

 BY FRED E. WRIGHT 



was given without notes, and was illustrated with a suite of specimens; 

 5 minutes. 



" Introduced by J. E. Wolff. 



