328 



PROCEEDINGS OP THE AMERICAN ACADEMY 



Mr. N. D. C. Hodges described a new galvanometer. 



Professor Shaler read a short paper on explorations in coal 

 mines. Remarks on this paper were offered by Messrs. 

 Watson and Ordway. 



Seven hundred and nineteenth Meeting. 



March 12, 1879. — Stated Meeting. 



The President in the chair. 



The Chair named six additional members of the Centennial 

 Committee, in accordance with the vote of the Academy at 

 its meeting of January 8. The Committee was thus consti- 

 tuted as follows : — 



Charles F. Adams, Chairman, Robert C. Winthrop, Asa 

 Gray, John A. Lowell, Theodore Lyman, Josiah P. Cooke, 

 Jr., and Benjamin E. Cotting. 



The following papers were presented : — 



" On the Degree of Reliability of Marey's Drum for Time 

 Experiments." By James J. Putnam. 



" On a Modified Pendulum Myograph." By James J. 

 Putnam. 



" On the Coefficient of Expansion of the Brass Bars used 

 by the United States Coast Survey for Standards of Length." 

 By William A. Rogers. 



The following paper was presented by title : — 



"On certain Parachlorbenzyl Compounds." By C. L. 

 Jackson and J. Fleming White. 



The following gentlemen were elected members of the 

 Academy : — 



Edward Atkinson, of Boston, to be a Resident Fellow in 

 Class III., Section 3. 



James Freeman Clarke, of Boston, to be a Resident Fellow 

 in Class III., Section 1. 



Frank Winthrop Draper, of Boston, to be a Resident Fel- 

 low in Class II., Section 4. 



