Proceedings of the Society. 13 



Mr. W. H. Fisher reported verbally on behalf of the Auditing 

 Committee. (The report in writing was afterwards filed with the 

 Secretary). 



President Dun said that a class would be organized at an 

 early day to study the weather under Mr. S. S. Bassler. 



The Botanical Section showed a collection of native and 

 hardy exotic plants in blossom, in all about eighty species. 



Members were invited to attend a meeting of the Photo- 

 graphic Section on Thursday, May 6th, at 3 p. m., to examine a 

 series of lantern slides. 



Adjourned. 



Donations were announced as follows : From Chief Signal 

 Service, Weather Review, February, 1886; from Geo. J. 

 Hinde, one pamphlet ; from P. Herbert Carpenter, Review of 

 Fossil Crinoids; from J. F. Judge, M. D., collection of shells, 

 fossils, etc.; from A. P. Morgan, species ofPolyporei of Miami 

 Valley to illustrate articles published in the Society's Journal ; 

 from Paul Mohr, sixteen (16) specimens marbles ; from John H. 

 Warder, specimen Bessemer Steel, two specimens artificial 

 graphite. 



MICROSCOPICAL EXFIIBITION. 



On the 30th of April a public microscopical exhibition was 

 given at the rooms of the Society. Some twenty microscopes were 

 exhibited by Messrs. F. Spaeth, M. A. Spencer &Co., Crocker &: 

 Co., and Dr. Marsh, as wellas by members of the Society. 



The objects to be seen covered almost the entire field of 

 microscopical research. Micro organisms of disease were ex- 

 hibited by Drs. Ricketts and Caldwell. Diatoms by H. C. 

 Fithian and Dr. J. H. Hunt. Living pond life in the shape of a 

 hydra by Dr. Hunt, and fresh water alg?e by Geo. B. Twitchell. 



Dr. Taft exhibited a section of a cat's jaw, which aside from 

 its value for study in histology, was a remarkable specimen of 

 skillful work in preparation. The circulation of the blood 

 in a frog's foot could be seen through Dr. Dun's microscope. 

 Prof. James demonstrated the microscopic structure of the higher 

 plants. In the way of accessary apparatus a new microtome 

 exhibited by Dr. Allen, proved of great interest to all working 

 microscopists present. 



