196 The Microscope. 



Dr. James had described, for many years, and wanted nothing 

 better. 



Dr. James exhibited some slides finished with zinc cement, 

 and they were passed around for examination. All who saw 

 them declared them to be the perfection of the art of mounting, 

 and congratulated the doctor on his success with so refractory a 

 medium as glycerine." 



Ex-Governor J. D. Cox followed with a paper on 



" ACTINIC AND VISUAL FOCI IN PHOTO MICROGRAPHY WITH HIGH 



POWERS." 



This paper cannot be fairly reported without the illustra- 

 tions that accompanied it. The question was how to devise a 

 more exact and scientific method to determine the difference 

 between the focal length at which a sharp image is presented to 

 the human eye and that at which a clear photographic image is 

 produced. 



In this connection arose the question whether this subject 

 dealt with "photo-micrography" or " micro-photography." 



Mr. Walmsley quoted Worcester as giving a clear definition 

 between the two terms ; the prints illustrating the paper being, 

 according to this authority, " photomicrographs." [See article 

 under " Editorial Notes."— Ed.] 



Dr. Newcomer said it was formerly a test of a man's sobri- 

 ety to ask him to say " National Intelligencer ;" but if he had 

 taken even a single glass of wine it would certainly embarrass 

 him to say " photo micrography," hence he should favor the 

 latter term. 



Dr. Stowell then moved that the society adjourn and im- 

 mediately hold a special session, to take action on the death of 

 Dr. Thad. S. Up de Graff. The doctor then spoke feelingly of 

 the loss of this valuable member to the society, and said that 

 " although we have been arrayed against each other on many 

 points in science, yet I have ever found him generous and 

 hearty." 



Dr. Fell and others followed in tender words of regret for 

 this personal and public loss. 



General Cox called the evening meeting to order and intro- 

 duced President Smith as " one who for a generation has been a 



