SPECIES DESCRIBED BY VARIOUS WRITERS. 2OQ 



solute alcohol, and from this transferred to a 1*5 per cent, 

 solution of permanganate of potash. After ten minutes 

 they are immersed for a moment in a pure concentrated 

 solution of sulphurous acid. If the section is not com- 

 pletely decolorised, immersion in the alcohol and in the 

 acid bath must be repeated three or four times. The sec- 

 tions are finally dehydrated with absolute alcohol, cleared 

 with clove-oil, and mounted in Canada balsam. 



Bacillus of Rhinoscleroma, Cornil and 

 Alvarez.* Short rods, 1*5 3 ^ in length, '5 '8 /x 

 thick. Deeply coloured points or granules are ob- 

 served in the course of the rods when stained, and 

 are possibly spores. The rods have rounded ends, 

 and the smaller ones are ovoid in shape. The 

 bacilli are surrounded by ovoid capsules. The 

 capsule is composed of a tough resisting sub- 

 stance ; two or more capsules may unite by 

 fusion, enclosing two or three, or a great num- 

 ber of rods. The bacilli were observed in sections 

 of a tumour rhinoscleroma, which develops on 

 the lip and on the nasal and pharyngo-laryngeal 

 regions. 



METHOD OF STAINING THE BACILLUS OF RHINO- 

 SCLEROMA. 



Method of Cornil and Alvarez : 



Sections are immersed in a solution of methyl-violet 

 (B) for twenty-four to forty-eight hours, with or without 

 the addition of aniline-water ; are then decolorised after 



* Cornil and Babes, Les Bacteries 1885. 



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