Photographical Section Proceedings. 1027 



Mr. fliUl also read the specifications of Mr. Gage's patent claim, 

 as published in the Philadelplda Photographer. 



Prof. Tillman asked whether any member had tried Mr. Gage's 

 device. 



Mr. H. S. Anthony thought it advisable that some competent 

 person should try the process and report to the Section. 



Mr. Hullenback explained a method which consisted of exposing 

 the plate to diffused ' light after its removal from the camera and 

 before development. Then followed a general discussion upon 

 various methods which had been used to produce similar results. 



On motion of Mr. Hull, a committee of three were appointed to 

 make pictures by Mr. Gage's process, and by the ordinary negative 

 process, and exhibit the results at the next meeting of the Section. 



Messrs. Anthony, Hull and Chapman were appointed by the 

 Chair to serve as such committee. 



On motion of Mr. Chapman, the name of the Chairman was added 

 to the committee. 



The Secretary laid before the Society several elaborately illus- 

 ti'ated books, produced by the American Photo-Lithographic Com- 

 pany; also a series of maps illustrative of some of the battle fields 

 of the South. 



Mr. Newton exhibited negatives and prints produced ]jy his 

 acetate of morphine process — li grs. to an ounce of 10 gr. tannin 

 solution, giving an exposure of one minute, and also others with 

 forty-five seconds exposure — which he considers at least ten times 

 as sensitive as the ordinary tannin process. He develops with an 

 ordinary iron developer. 



Prof. Tillman called up the matter of photographic pictures of 

 the recent fair of the Institute, followed by a general discussion 

 upon their merits. 



Mr. Anthony stated that the most sensitive preparation for solar 

 printing, he had found to be oxide of silver, in (nitrate of ammonia 

 solution, about 40 grs. to an ounce) oxide equivalent to 10 grs. of 

 nitrate of silver. He had found a double nitrate of silver and 

 ammonia to work well. 



On motion of Prof. Tillman, the time of meeting was changed to 

 the first Tuesday in the month, instead of the second Monday. 



The Section then adjourned to the first Tuesday in December. 



