76 TRANSACTIONS OF THE [jAN. 6, 



the minutes of the Academy, and another copy be engrossed 

 and transmitted by the Secretary to his bereaved family; 



N. L. Britton, 



H. Carrington Bolton, 



Daniel S. Martin, 



Commit lee. 

 New York, Jan. 6th, 1S90. 



The paper announced for the evening was to be read by Prof» 

 W. GooLD Levison upon 



experiments in pyrotechnical photography, 



but, in consequence of the illness of the author, it was post- 

 poned to a later date. [The paper was presented on February 

 10th.] 



In the absence of Prof. Levison, and in order to carry out 

 the discussion of a kindred topic, Dr. A. A. Julien had pre- 

 pared, at very short notice, a paper entitled 



suggestions IK photomicrography. 

 (Abstract.) 



The processes of photomicrography are, in general, of the 

 highest value, in association with drawing, in teaching any 

 branch of natural history with the use of the microscope. 

 Patient and long-continued observation with that instrument, 

 in the ordinary way of study, is very difficult and trying for the 

 young and inexperienced student. But in the production of a 

 picture, both by freehand drawing with the pencil, and by 

 photography, the artistic instinct is awakened, the observation 

 becomes more keen, the judgment becomes trained, and a new 

 interest is aroused in the object which is being studied. 



The difficulties of photomicrography have been much exag- 

 gerated. With objectives of the lowest magnifying power, so 

 easy is the process, and so captivating, that it might be substi- 

 tuted with advantage and profit, even in the education of chil- 

 dren, in place of many of the ''studies" for cramming the 

 memory which have been long in vogue. 



It is also not difficult to convey to the mind of even a child a 

 good idea of the chemical reactions involved in photographic 

 processes, so far as they have yet been understood. His practical 



