philosophical society op washington. 21 



2d Meeting. March 18, 1811. 



The President in the Chair. 



Professor S. F. Baird communicated to the Society, on behalf 

 of the author, a copy of a memoir entitled — 



OFFICIAL REPORT OF THE YELLOWSTONE EXPEDITION OP 1870, BY 

 LIEUT. G. C. DOANE, 2d U. S. CAVALRY. 



(^This Report will be found puhlished in full as Official Document, Senate, 

 No. 51, Alst Congress, Zd Sexnion.) 



5d Meeting. April 1, 18tl. 



The President in the Chair. 



The General Committee reported to the Society the " Consti- 

 tution," which was adopted. 



(For the Constitution and Standing Rules see pp. 14, 15, 16.) 



The President announced that the following gentlemen had 

 l)een appointed on the Sub- Committees, viz. :— 



SUB-COMMITTEES. 

 On Papers and Essays : 



Chairman, J. J. Woodward ; 



S. L. Casey, J. E. Hilgard. 



On Publication : 



Chairman, S. F. Baird; 



B. F. Craig, Theodore Gill. 



The transaction of business being concluded, General M. C. 

 Meigs laid before the Society a map of the head waters of the 

 Yellowstone and Lewis rivers. 



Mr. J. E. Hilgard read a paper entitled— 



ON THE DISTANCE TRAVERSED BY APPROACHING THE NORTH POLE 

 ON A LOXODROMIC CURVE. 



