XX1\- DESCRIPTION OF PLATES. 



DESCRIPTION OF PLATE V. 



Bacillus Authracis. 



FoUowing p. 192. ^ 



KiG.' I. — From a cover-glass preparation of blood from the spleen of a guinea- 

 pig inoculated with blood from a sow. x 1200. Powell and Lealand's 

 apochromatio yV Horn. imm. E.. P. 10. 



Fig. 2. — From a section of a kidney of a mouse. Under a low power the 

 preparation has exactly the appearance of an injected specimen. Under 

 higher amplification the bacilli are seen to have threaded their way along 

 the capillaries between the tubules, and to have collected in masses in 

 the glomeruli. Stained with Gram's method (gentian-violet), and eosin. 

 X 500. 



Fig. 3. — Sacillus anihracis and Microcoemis tetragemig. From a section from 

 the lungs of a mouse which had been inoculated with anthrax three days 

 after inoculation with Micrococcus tetragenus. A double or mixed infection 

 resulted. Anthrax-bacilli occurred in vast numbers, completely filling the 

 small vessels and capillaries, and in addition there were great numbers 

 of tetrads. Stained by Gram's method (gentian-violet), and with eosin. 

 X 500. 



DESCKIPTION OF PLATE VI. 

 Bacillus Murisepticus. 



Follovnnff p. 224. 



Fig. 1. — From a section of a kidney of a mouse which had died after inocula 

 tion with a pure-cultivation of the bacillus. With moderate amplification, 

 the white blood-corpuscles have a granular appearance, and irregular 

 granular masses are scattered between the kidney tubules. Stained by 

 Gram's method with eosin. x 200. 



Fig. 2. — Part of the same preparation with high amplification. The granular 

 appearances are found to be due to the presence of great numbers of 

 extremely minute bacilli, x 1500. 



DESCEIPTIOX OF PLATE VII. 



Casual Cow-pox. 



FoUotcinff p. 278. 



Fig. 1. — Case of W. P , a milker, infected from the teats of a cow with 



natural cow-pox. There was a large depressed vesicle with a small 

 central crust and a tumid margin, the whole being surrounded by a 

 well-marked areola and considerable surrounding induration. 



Fig. 2. — The same case a week later, showing a reddish-brown crust on a 

 reddened elevated and indurated base. 



