Record. Iv 



without danger of contamination from atmospheric ammonia, 

 etc. 



The Secretary presented a paper by Mr. Charles Bobertson, 

 entitled Flowers and insects. 



Mr. William H. Roever presented a paper on the geometry 

 of the lines of force from an electrified body. 



April 20, 1896. 



President Gray in the chair, seventeen persons present. 



Professor C. M. Woodward presented the results of a study 

 of certain statistics of school attendance, from which it 

 appeared that the average age of withdrawal from the public 

 schools in three cities compared was as follows : — 



Boston 15.8; Chicago, 14.6; St. Louis, 13.7. 



Professor J. H. Kinealy exhibited and gave a mathematical 

 discussion of the Stang planimeter. 



May 4, 1896. 



President Gray in the chair, thirty-five persons present. 



Professor F. E. Nipher read a preliminary paper on a 

 rotational motion of the cathode disk of a Crookes tube. 



Dr. E. C. Runge gave the history of an interesting case 

 of insanity which had remained undetected for twenty-eight 

 years. 



The President announced the death on April 22, 1896, of 

 Dr. C. O. Curtman, and on motion Drs. Evers, Alt and 

 Bremer were appointed a committee to prepare a suitable 

 memorial of Dr. Curtman. 



May 18-, 1896. 



Vice-President Engler in the chair, nineteen persons 

 present. 

 Professor C. M. Woodward presented a critical examina- 



