Photo GRAPHICAL Section Proceedings. 1035 



trations of the subject with lenses at a previous meeting of the 

 Section. 



After a statement of some of the leading points in the contro- 

 versy by Prof. Vanclerweycle, the Chair, upon motion, appointed 

 as such committee, Messrs. Chapman, Newton and Thomas. 



Mr. Hollenbeck exhibited a series of imperial card photographs, 

 by Messrs. Gurney & Son. 



Messrs. Huston & Kurtz exhibited a large and very fine collec- 

 tion of their carbon pi-ints, in various colors. 



In answer to a question by the Chairman, they stated that they 

 used tissue by Swan, of England; Braun, of Dornback; Bingham, 

 of Paris; and Powells, of Boston. Powells' tissue seemed the 

 best adapted to this climate, and when worked with Swan's process 

 gave the best and most uniform results. 



The prints were much admired, and occasioned considerable dis- 

 cussion upon the various methods of carbon printing. 



Mr. Wilson, of Philadelphia, laid before the Section several very 

 fine portraits, studies by Adam Salomon, of Paris. 



Mr. Griswold exhibited a collection of direct carbon prints, and 

 stated that they could be made upon any ordinary white paper, 

 and with as great or greater facility than silver prints by the ordi- 

 nary photographic process now in use. 



By request of Mr. John Johnson, the Secretary read from the 

 Scientific Ameincan an article originally published in the British 

 Journal of Photography, entitled "Contributions to the History of 

 Photography;" after the reading of which Mr. Johnson called 

 attention to and corrected several erroneous statements in the 

 article. 



Dr. Boynton inquired whether Mr. Johnson's experiments with 

 bromide were published at the time, or soon after they were made. 



Prof. Vanderweyde exhibited several cameras which were made 

 and used soon after the discovery of the daguerreotype process. 



The Section then adjourned to the first Tuesday in May. 



