lvi Trans. Acad. Set. of St. Louis. 



from photomicrograpkic negatives showing mitoses in 

 rhizomes of Erythronium albidwn, and in microspore mother 

 cells and microspores in Lilium Philadelphicum and Pinus 

 laricio, and megaspores in Lilium Canademe. The possi- 

 bility which photomicrography affords, of giving structural 

 details with relative fidelity, was illustrated by these photo- 

 graphs and by lantern slides. 



Mr. Guido Pantaleoni, of St. Louis, Professor L. H. 

 Bailey, of Ithaca, New York, Professor M. A. Brannon, of 

 Grand Forks, North Dakota, Professor C. M. Jackson, of 

 Columbia, Missouri, Professor S. C. Mason, of Berea, Ken- 

 tucky, Professor Aven Nelson, of Laramie, Wyoming, Mr. 

 Gustavus Pauls, of Eureka, Missouri, and Professor A. G. 

 Smith, of Iowa City, Iowa, were elected to active membership. 



Four persoos were proposed for active membership. 



May 7, 1900. 



President Engler in the chair, twenty-three persons present. 



Mr. Charles Epenscliied presented an address on modern 

 flour milling, tracing the history of the preparation of grain 

 for human food, the developments since 1865, when it was 

 discovered that " middlings," when properly cleaned, could 

 be reground to the best of flour, and the introduction of chilled 

 steel rolls to replace the older millstones, so that to-day a 

 good mill separates practically all the flour in a grain of wheat 

 in its most perfect form, and is always automatic in opera- 

 tion. It was stated that while larger mills are in operation, 

 the most economical mill in use at the present time is that 

 having a daily capacity of about one thousand barrels of 

 flour. 



Dr. H. von Schrenk made some remarks concerning the 

 propagation of fruit trees, particularly the apple, illustrating 

 by a large number of specimens the methods of budding and 

 root-grafting which are used for commercial purposes, and 

 discussing at some length the question of the quality of the 

 root system obtained for the new plant by the various modes 

 of propagation. 



Professor F. E. Nipher exhibited some photographic nega- 



