358 



Dr. S. L. Abbot exhibited several figures of micros- 

 copic objects, done by the new process of Photo-Lith- 

 ography. 



This process is a new invention, the result of the joint labors 

 of Mr. J. A. Cutting, Photographer, and Mr. S. H. Bradford, 

 Lithographer, both of Boston. These gentlemen have succeeded 

 in imparting a sensitive surface to the lithograph stone, so that 

 the image of the object may be thrown directly upon it, as in the 

 ordinary method of photography. The photograph thus pro- 

 duced may be printed from directly, by the common lithograph 

 ■processes. In the case of the figures exhibited, the image mag- 

 nified by the microscope was thrown by means of a camera upon 

 the prepared stone. The discovery promises to be one of very 

 great value. Among the figures exhibited were photo-lithographs 

 of blood globules, the cornea of a fly's eye, sections of wood, &c. 



The Corresponding Secretary read the following let- 

 ters, viz : — 



From the Societe Eoyale des Sciences de Liege, April 20th, 

 1856 ; Zoologisch-Botanischer Verein, Vienna, June 23, 1857 ; 

 Royal Society of London, August 6, 1857 ; Royal Institution of 

 Great Britain, November 16, 1857 ; Geological Society of Lon- 

 don, December 3, 1857 ; Public Library of Boston, January 20, 

 1858 ; Corporation of Harvard College, Feb. 4, 1858 ; Essex 

 Institute, Feb. 11, 1858; Lyceum of Natural History, New 

 York, Feb. 16, 1858; New York State Library, Feb. 27, 1858, 

 acknowledging the receipt of the Society's publications ; Societe 

 Royale des Sciences de Liege, April 20, 1856 ; the same, June 

 5, 1856 ; Zoologisch-Botanischer Verein, Vienna, June 10, 1857 ; 

 Academic Royale des Sciences de Stockholm, July 10, 1857, 

 presenting their various publications ; H. Davis, Feb. 2, and J. 

 A. Swan, Feb. 13, acknowledging their election as Correspond- 

 ing Members ; and from H. Davis, Jan. 19, offering to send 

 specimens to the Society. 



