Record. xlix 



February 5, 1900. 



President Engler in the chair, about two hundred and fifty 

 persons present. 



A series of microscopic objects showing some of the tech- 

 nical applications of the microscope, was exhibited under the 

 direction of Dr. H. M. Whelpley, with the assistance of Dr. 

 R. J. Terry (anatomy), Dr. Amand Eavold (bacteriology), 

 Dr. Ludwig Bremer (blood examination), Mr. H. F. Roberts 

 (botany). Dr. H. von Schrenk (diseases of forest trees), Mr. 

 O. H. Elbrecht (drug adulterations), Mr. Victor Goetz (flour 

 inspection), Mr. C. F. Baker (insects parasitic on man), Dr. 

 Otto A. Wall, Jr. (living protoplasm), Mr. Robert Benecke 

 ( microphotography and photographic dry plate testing). Dr. 

 G. Hambach (mineralogy). Dr. Adolph Alt (photomicro- 

 graphy). Dr. Hartwell N. Lyon (physiology), Mr. F. W. 

 Maas (seed adulterations), Mr. William K. Ilhardt ( spice adul- 

 terations), Mr. Peter J. Weber, Jr. (textile fibers), and Dr. 

 G. C. Crandall (trichina). Through the courtesy of the 

 Historical Society, the rooms of that Society were thrown open 

 to the members of the Academy and their guests, and the 

 Society's important collections were examined with interest 

 while the special demonstration of the evening was in progress. 



Mr. George W. Niedringhaus and Professor F. Louis Sol- 

 dan, of St. Louis, were elected to active membership. 



February 19, 1900. 



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



The acceptance of the resignations of Dr. M. A. Bliss and 

 Mr. Alfred Clifford, and the addition of the following institu- 

 tions to the exchange list of the Academy, were reported by 

 the Council: Carnegie Museum; Leland Stanford Junior 

 University ; Mathematisch-naturwissenschaf tlicher Verein, 

 Stuttgart ; Medicinisch-naturwissenschaftliche Gesellschaft, 

 Jena; Nord Bohmischer Excursions-Club ; Northern Indiana 

 Historical Society ; Ohio State University ; Royal Geographi- 

 cal Society of Australia, South Australian Branch ; Uni- 



