Jan., 19 IG] Ohio Academy of Science 109' 



employed, the blocks and intervening spaces are covered 

 and filled with cotton. After the mounted specimens are 

 placed into their respective compartments, the celluloid should 

 be placed over one-half of the frame. The sheets of celluloid 

 comes in sheets 20" x 50". One sheet will cover the entire 

 frame, but necessarily in two pieces, allowance being made for 

 overlapping at the center crosspieces and fastening to the edges 

 of the frame. (See working plan). For the specimen cases, 

 oak strips 3/16" x 5/16" are employed to fasten the celluloid in 

 place, these being a part of the frame. The other strips for the 

 cross-partitions are Y/ wide. These strips are fastened with 

 small screws, (counter sunk), which pass through the celluloid 

 and into the frame proper. 



The weight of one of the specimen cases when completed 

 and containing the specimens, is about 13 pounds. The total 

 cost is approximately $2.50. 



The Material Necessary for the Construction of One of the Specimen Cases: 



OHIO ACADEMY OF SCIENCE. 



QUARTER-CENTENNIAL ANNIVERSARY. 



The Twenty-fifth Annual Meeting of the Ohio Academy of 

 Science was held at the Ohio State University, Columbus, on 

 Friday and Saturday, November 26 and 27, 1915, under the 

 presidency of Professor J. Warren Smith, of Columbus. 



Owing to the anniversary character of the meeting, the usual 

 program of volunteer papers was replaced by a series of invited 

 addresses, as follows: 



Presidential Address — Agricultural Meteorology, Professor J. 



Warren Smith, United States Weather Bureau, Columbus. 

 Address — Applied Meteorology and the Work of the Weather 



Bureau, Doctor Charles F. Marvin, Chief United States Weather 



Bureau, Washington, D. C. 



