320 PROCEEDINGS OF THE AMERICAN ACADEMY 



of the motion of the Gyroscope, an instrument which is at- 

 tracting considerable attention at the present time ; ascribing 

 the credit of its invention to the late Professor Walter R. 

 Johnson of Philadelphia. 



Four hundred and tUirtieth meeting. , 



.September 8, 1856. — Monthly Meeting. 



The President in the chair. 



The Corresponding Secretary read letters from Thomas 

 B. Gary, Rev. George E. Ellis, Charles J. Sprague, and 

 John B. Henck, accepting their appointment as Associate 

 Pellows. 



A circular was read from the Committee on the Inaugura- 

 tion of the Statue of Franklin, inviting the Academy to join 

 in the procession on the day of that ceremony. It was ac- 

 cordingly voted, — 



" That the Academy accept the invitation thus politely extended to 

 them ; and that the Committee for placing the Statue be invited to 

 make use of the rooms of the Academy as a place of rendezvous on 

 the day of inauguration, Franklin himself having been one of the ear- 

 liest Fellows of the Academy." 



Dr. Durkee exhibited to the Academy a box of specimens 

 of gigantic Scai^ahaidcB from the vicinity of Gaboon River, 

 Africa; also specimens oi Platyphyllum concavurn (Katydid), 

 of both sexes, obtained in Milton, Mass. ; also Spect7'utn fenio- 

 ratum. 



Professor J. Lovering read, in behalf of Colonel Emory, by 

 title, a " Memoir containing the Results of Magnetic Observa- 

 tions not yet published ; and combining the Results of all the 

 Magnetic Observations made under my Orders in the United 

 States and Mexican Boundary Commission. By Colonel W. 

 H. Emory." This memoir was referred to the Committee of 

 Publication. 



Dr. Jenks read a highly interesting letter, written on July 21, 

 1781, by Dr. Richard Price, to President Joseph Willard, who 



