ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



24S 



solutions and diastases on the numerous colloids found in living- 

 organisms. It would seem that the minuteness of many bacteria is an 

 insufficient test of their identification, and that more difficult characters, 

 such as peculiar motility, tactism, agglutination, must be looked for : 

 possibly sensitiveness to different kinds of coloured illumination may 

 be found. In the examination of a living culture in bouillon of the 

 microbe of a bovine peripneumonia totally reflected light revealed 

 numerous brilliant corpuscles animated by a movement indistinguishable 

 from Brownian. Great care was taken to ensure that the observations 

 were not tainted by any accidental inequalities or defects in the glass 

 used. 



Horder's Clinical Case. — Fig. 39 shows an improved form of the 

 clinical case exhibited at the November meeting.* The modification 

 consists in an alteration in the size of the case, which now measures 



Fig. 39 



141 mm. by 100 mm. by 31 mm. The increased capacity of the case 

 allows the inclusion of additional requisites such as pipettes, haiina- 

 cytometer counting chamber, rack for drying cover-glasses, and some 

 other additional articles. 



* See this Journal, 1903, p. 7S2. 



