xx Trans. Acad. Set. of St. Louis. 



Dr. Henry Milton Whelpley, of St. Louis ; Henry Eggert, of 

 East St. Louis, Illinois. 



Sixteen persons were proposed for active membership. 



February 21, 1898. 



President Engler in the chair, thirteen persons present. 



Dr. R. J. Terry exhibited a specimen of a cervical rib from 

 a human subject, and discussed the occurrence of structural 

 anomalies of this character. 



The following persons, resident in St. Louis, were elected 

 active members: Win. B. Becktold, Henry Branch, Wm. 

 Burg, John D. Davis, Otto J. Fruth, J. B. Gazzam, Dr. W. 

 W. Graves, Willis H. Grocott, A. Q. Kennett, Leonard 

 Matthews, Theo. G. Meier, Dr. Albert Merrell, Aug. H. 

 Muegge, Alexander T. Primm, John R. Thomas. 



Seven persons were proposed for active membership. 



March 7, 1898. 



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



Professor C. M. Woodward presented a paper embodying 

 an analytical discussion of the efficiency of gearing under 

 friction, spur wheels with epicycloidal and involute teeth 

 being considered. 



Dr. Amand Ravold demonstrated the method, recently intro- 

 duced by Philip Hanson Hiss, of differentiating the typhoid 

 bacillus from Bacillus coli-communis , by the use of semi-solid 

 acidulated media, in which, at blood temperature, the round col- 

 onies of the typhoid bacillus assume a peculiar fimbriated form 

 of growth, because of the motility of the bacteria in the slightly 

 yielding medium, which in most cases readily distinguishes 

 them from the more whetstone-shaped colonies of the colon 

 bacillus, which does not produce the peculiar fimbriation in 

 plate cultures. In tube cultures in the same general medium, 

 but prepared with a slighter acidity and somewhat less solid- 

 ity, a uniform clouding of the entire tube, due to the swarm- 

 ing of the bacteria, was shown to be characteristic of the 

 typhoid bacillus, while the colon bacillus was definitely con- 



