34 JOURNAL OF THE [January, 



PROCEEDINGS. 

 Meeting of October 2d, 1891. 



The Vice-President, Mr. J. D. Hyatt, in the chair. 



Twenty-five persons present. 



Dr. Charles Lehlbach was elected a resident member. 



The Recording Secretary read a communication from the 

 Scientific Alliance of New York requesting the Society to unite 

 in arranging a mutual programme. 



On motion it was resolved that the matter be referred to the 

 Board of Managers to report at the next meeting. 



The Corresponding Secretary announced a donation of dia- 

 tomaceous material from Mr. K. M. Cunningham, of Mobile, 

 Alabama, accompanied by the following communication dated 

 August nth, 1891: 



"To-day I mailed to your address a specimen of a new 

 diatomaceous material find, recently brought to light by myself. 

 This material is sufficiently cleaned to mount directly. It is 

 from the west bank of the Mobile River, and is a tidal marsh 

 mud taken from three to five feet below the surface, and has 

 probably not been seen heretofore by diatom admirers. Four 

 or five forms occur in great abundance — Campylodiscus, Actino- 

 cyclus, Terpsinoe, with a sprinkling of others. 



" The material will make elegant balsam or dry mounts for 

 condensed surface illumination for binocular. It is a cleaning by 

 Dr. Geo. H. Taylor, of Mobile, and is of unusual interest before 

 acid treatment, as it shows a fair mixture of a wide variety of 

 rhizopods, sponge spicules and diatoms, not to mention a great 

 variety of transparent plant tissues of great diversity of cellular 

 structure, with scales of mica, which polarize very prettily." 



Mr. Hyatt announced the finding of marine forms of diatoms 

 in the filter beds of the city water works of Poughkeepsie, New 

 York. 



Dr. E. G. Love addressed the Society on '' The History and 

 Development of the Microscope up to the time of Achromatism." 

 This address was a most interesting and able explication of the 

 subject, and was beautifully illustrated by the projection of fifty 

 lantern slides of diagrams, antique instruments and accessories. 



