504 PROCEEDINGS OP THE AMERICAN ACADEMY 



The Committee on the Topographical Survey of the State 

 was discharged. 



On the motion of Dr. Gray, it was 



Voted, To appropriate for the ensuing year : — 



For general expenses $2,200 



For publications 2,000 



For library 1,200 



The following paper was presented •. — 



On the Use of the Almucantar. By Seth C. Chandler, Jr. 



The following papers were presented by title : — 



Notes on some North American Species of Saxifraga. By 

 Asa Gray. 



A Contribution to our Knowledge of Paleozoic Arachnida. 

 By Samuel H. Scudder. 



Papers on Thermo-electricity: I. On the Application of 

 Thermo-dynamics to Superficial Tension and Thermo-elec- 

 tricity. II. On the Thermo-electric Relations of -Metals 

 deposited by Electricity in a Magnetic Field. By John 

 Trowbridge and Charles B. Penrose. 



On the Application of Photography to Electrical ]\Ieasure- 

 ments and to Heat Measurements. By John Trowbridge. 



Comparison of Williamstown Right Ascensions of Polar 

 Stars with late Observations made elsewhere. By Truman 

 H. S afford. 



Experiments on the Rotational Coefficients in various 

 Metals. By Edwin H. Hall. 



Seven hundred and seventy-flfth Meeting. 



October 8, 1884. — Stated Meeting. 



The President in the chair. 



The Corresponding Secretary read the following letters : 

 from Sir William Thomson, enclosing a communication from 

 the Chancellor of the University of Edinburgh, thanking the 

 Academy for sending a delegate to its Tercentenary Festival; 



