B24 [May, 
Maury, enclosing one from Signor Juan Espinoza, dated Lima, 10th 
March, 1853, addressed to J. Randolph Clay, Esq., U. S. Chargé at 
Lima, containing some observations on Acrolites and Earthquakes. 
Sig. Espinoza stated that he had, on several occasions, observed the 
phenomenon of the detachment of the armature of a suspended magnet 
just before an earthquake. 
The following resolutions were unanimously adopted : 
Resolved, That the thanks of the Academy of Natural Sciences of 
Philadelphia be presented to Charles Henry Fisher, Esq., and Thomas 
Biddle, Esq., for the valuable aid rendered by them to the Committee 
appointed by the Society to obtain subscriptions for the purchase of the 
Anatomical Collection of the late Dr. Samuel George Morton. 
Resolved, That the thanks of the Society be presented to Mr. Wm. 
S. Vaux, Dr. Charles D. Meigs and Mr. John Cooke, Committee ap- 
pointed to procure the subscription for the purchase of Dr. Morton’s 
Anatomical Collection. 
May 24th. 
Vice-President BripGes in the Chair. 
A letter was read from the Royal Academy of Sciences of Brussels, 
dated 16th June, 1852, acknowledging the receipt of the Journal of the 
Academy, vol. 2, part 2, new series. 
Also a letter from the Academy of Sciences of Wurtemburg, dated 
Stuttgart, March 8th, 18528, acknowledging the receipt of the Proceed- 
ings for 1850 and 1851, and Nos. 1 and 2 of vol. 6th. 
On motion of Dr. Leidy, it was 
Resolved, That the Secretary be instructed to invite the Conventions, 
General Assemblies and other respectable Bodies, now in session in this 
city, to visit the Museum on specified afternoons. 
May 31st. 
Vice-President BRIDGES in the Chair. 
Prof. Alphonse De Candolle, of Geneva, was elected a Correspondent, 
and the following were elected Members of the Academy: | 
Messrs. Frederick Graff, Edmund Draper, Wm. G. E. Agnew, Dr. E. 
B. Gardette, Messrs. Chas. Henry Fisher, Thomas T. Lea, Thos. Biddle, 
John Farnum, John A. Brown, William Welsh, J. Francis Fisher, 
David S. Brown, Lewis R. Ashhurst, John B. Meyers, Richard D. Wood, 
Samuel V. Merrick, Henry Pepper, J. Pemberton Hutchinson, Richard 
Price, Morris L. Hallowell, Joseph D. Brown, William Platt, Joseph 
Swift, Singleton A. Mercer, A. J. Lewis, John Grigg, Joseph Jeanes, 
and Thomas P. Remington, all of Philadelphia. 
