290 ROCHESTER ACADEMY OF SCIENCE. [May 28, 



versity, upon the visible changes which take place in nerve cells as a 

 result of their functional activity. 



" The cells of resting or unworked nerve ganglia were found to 

 be large, rounded in outline, full of granular protoplasm, with large 

 rounded nuclei which stained faintly with a variety of dyes. In con- 

 trast to these, fatigued cells were shrunken in size, the protoplasm 

 contained a large number of spaces filled with watery fluid, the nuclei 

 were much shrunken and irregular in outline and the nuclei stained 

 deeply with the same dyes which stained the nuclei of resting cells 

 only faintly. 



" These differences indicate that the activity of the nerve cells 

 had been accompanied by a loss of the material substance or proto- 

 plasm, of which the cell is composed, as well as by a change in the 

 chemical nature of the substance. 



" Dr. Hodge's experiments go to prove that all nervous activity 

 whether in the direction of voluntary motion or of thought, is accom- 

 panied by an actual destruction of the material composing the nerve 

 cells. His experiment also shows that the fatigue cells, if allowed 

 to rest gradually regained the condition of the unworked cells. Here 

 then, is proof of the necessity of rest for people who are nervously 

 exhausted." 



Mr. E. J. Putnam remarked upon the new dynamos of the Citi- 

 zen's Light and Power Co. He described them as a novelty from the 

 Westinghouse Co., furnishing both a continuous and alternating 

 current with the same armature and winding. 



City Surveyor, J. Y. McClintock, who had just returned from a 

 trip up the Genesee River, made an address on which the substance 

 is as follows : 



" We have lately seen in the Genesee valley the third greatest 

 flood which has occurred for thirty or forty years ; studies have been 

 made to determme at what rate of speed the height of the flood trav- 

 eled from Mt. Morris to Rochester, and as this flood ran great enough 

 to cover the broad flats, it gave a good example. I found that the 

 flood was at its height as follows; Mt. Morris, May 2xst, 3 a. m. ; 

 Geneseo, May 21st, 12 m.; York, May 22d, 9 a. m.; Avon, May 23d, 

 6 a. m.; Rochester, May 23d, 2 p, m. 



" The distances down the general course of the valley are as 

 follows: Mt. Morris to Geneseo, 5^ miles; Geneseo to York, 3 

 miles ; York to Avon, 5^ miles ; Avon to Rochester, 18 miles. 



