12 " The Microscope. 



just received from Zeiss of Jena a number of low-power objectives 

 and oculars. These are apochromatic and are made of the new glass 

 the invention of which excited so much interest a year or so ago. 

 Besides the lenses for ordinary use to the microscope, Dr. Ferrer 

 exhibited projecting eye-pieces which are inserted in place of the 

 ordinary eye-piece:^ when the instrument is used in connection with 

 a micro-camera for photographing. Dr. Ferrer said he had but just 

 received the glasses and not fully tried them, but in his preliminary 

 tests of their powers he was convinced of their wonderful definition. 

 Comparative examinations were made of the Zeiss ordinary eye- 

 piece and the " compensating eye-piece," which occupied the mem- 

 bers for a long time and afforded much material for discussion. 



THE ST. LOUIS CLUB OF MICROSCOPISTS. 



'' I ^^HE regular monthly meeting of the club occurred at the Col- 

 -*- lege Tuesday evening, December 6. 



The attendance was large and the usual enthusiasm manifested 

 by the members. J. C. Falk had a pathological specimen of urine 

 and explained the method of microscopically examining the same. 

 A. C. Speth exhibited specimens of powdered tobacco and crystals 

 of cumerin found on commercial vanilla. Frank Davis presented 

 specimens of adulterated drugs. Other members added to the inter- 

 est of the evening. 



The club's collection of specimens is steadily growing by dona- 

 tions from the members. 



At the next meeting, which occurs Tuesday evening, January 3, 

 subjects will be discussed by D. L. Haigh, Wm. Ilhardt and H. M. 

 Whelpley. 



STATE MICROSCOPICAL SOCIETY OF OHIO. 



\ T the meeting held November 25, 1887, in the Library of Star- 

 -^ -*- ling Medical College, Columbus, Dr. H. J. Detmers gave an 

 interesting talk on the method of determining the qualities of 

 objectives. Dr. F. O. Jacobs desci*ibed the construction of his well- 

 known freezing microtome, and explained its superiority over other 

 instruments of this class. Several slides of bacilli were exhibited. 



