PHILADELPHIA, February 12, 1852. 



DR. W. S. W. RUSCHENBERGER. 



DEAR SIR: According to the directions of the Academy of Natural Sciences 

 of Philadelphia, we transmit you a copy of the resolutions passed relative to 

 your "Notice of the Academy," recently read before it. 



While we offer you our assurance of the pleasure afforded us in listening to 

 the pleasing details of the "Notice," we would congratulate you upon the grati- 

 fication you have been enabled to confer, not only upon the members of the 

 Academy but also upon all other persons interested in the progress of science, 

 by the rescue from oblivion of facts connected with the infancy and growth of 

 the Institution, which must become more and more valuable every year : as well 

 as by the satisfactory manner in which the records of its more recent events and 

 present condition are portrayed. 



With much regard, we remain your fellow-members, 



WM. S. VAUX. 



ROBERT BRIDGES. 



ROBERT PEARSALL. 



HALL OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA. 



February 10, 1852. 



At a meeting of the Society held this evening, the following Resolutions were 

 unanimously adopted, viz. : 



Resolved, That the members of the Academy have listened with the deepest 

 interest and satisfaction to the "Notice" just read. 



Resolved, That the thanks of the Academy be presented to Dr. W. S. W. Rusch- 

 enberger for the labor he has bestowed in the preparation of the able and faithful 

 notice read by him before the Society, and that he be requested to furnish to the 

 "Committee on Proceedings" a copy of the same for publication. 



Resolved, That Messrs. Wm. S. Vaux, Robert Bridges, M. D., and Robert 

 Pearsall, be a committee to communicate to Dr. Ruschenberger the foregoing 

 resolutions. 



PHILADELPHIA, February 13, 1852. 



GENTLEMEN : I have had the pleasure to receive your letter of the 12th inst. 

 enclosing a copy of resolutions, adopted at a meeting of the Academy of Natural 

 Sciences on the 10th instant, conveying to me, in most agreeable terms, its appro- 

 bation of my attempt to record a true history of the Institution. 



Your long association with the Academy, your intimate acquaintance with all 

 that belongs to it, and your knowledge of the details of every department, ac- 

 quired through years of personal labor, render your approval "of my "Address" 

 most valuable and gratifying. 



A copy of the Address will be placed at the disposal of the " Committee on 

 Proceedings." 



Accept the acknowledgments of your fellow-member, and believe me, 



Very truly, yours, 

 W. S. W. RUSCHENBERGER. 



WM. S. VAUX, ESQ., 



ROBERT BRIDGES, M. D., \ Committee. 



ROBERT PEARSALL, ESQ., 



