1898.] MICKOSCOPICAL JOURNAL. 65 



in case of premiums involving- $25,000 they may well em- 

 ploy the best experts. The urinary examination should 

 never be omitted, and each large city can now support one 

 or more microscopists who do this work. In St. Louis, 

 the Paul Paquin laboratories are working- up a larg-e prac- 

 tice by advertising- and by skillful work. 



Opaque Objects. — Prof. Gates has discovered how to 

 view, with a microscope of hig-h power, the upper surface 

 of an opaque object, by means of reflected lig-ht, in such a 

 manner as to g-et details never before obtained by super- 

 stag-e illumination. He finds by using- rays of the short- 

 est possible wave-leng-th that he can focus down into an 

 opaque object upon details beneath the surface. This is 

 especially applicable to org-anic tissue. It is a discovery of 

 the very g-reatest possible interest to patholog-y and biol- 

 og-y in g-eneral. With lenses out of other substances than 

 g-lass, he feels sure that he might be able to focus the ultra- 

 violet microscope upon a living- cell in the living- cortex and 

 take a photomicrog-raph of such a cell throug-h scalp, skull, 

 pia and dura, and neuroglia. He has been able already to 

 focus upon a capillary beneath the sub-cutaneous tissues 

 of the fing-er. 



Angina. — Micrococcus tetrag-enus has been proven in 

 cases of ang-ina. There were usually manifestations of 

 disease in the pleura preceding- the angina. The cultures 

 show it alone or associated with different microbes. 



Mosquitoes. — Malarial disease is carried by these ag-ents 

 rather than by winds. It is well-known that people in 

 houses protected by mosquito netting- rarely g-et malaria. 



Agar-agar Jelly. — Gallois uses it in skin diseases on ac- 

 count of cleanliness in lieu of lard or vaseline. For ery- 

 sipelas take 1.5 ^rain corrosive sublimate, same of tartaric 

 acid, 15 g-rains of ag-ar-ag-ar, and 3 ounces of water. 



