220 THE AMERICAN MONTHLY [J^ne 



He found positive evidence of the transmission of strep- 

 tococcus, pneumococcus, andLoffler's diphtheritic bacillus. 

 It was found impossible to transmit tuberculosis to animals 

 by means of paper heavih' charg-ed with Koch's bacillus, 

 — a curious fact, the explanation of which does not yet ap- 

 pear. The observations were also negative as reg-ards the 

 typhoid bacillus. According- to the Revue Internal de Med. 

 et de Chir., the typhoid bacillus may be disting-uished in the 

 evacuations and secretions, and differentiated from the 

 coli bacillus within twenty-four to forty-eight hours by the 

 following- method described by Eisner: A culture medium 

 is prepared by means of g-elatin boiled with a decoction of 

 potato, to which is added a solution of soda in sufficient 

 quantity to produce a deg-ree of acidity equal to that of 

 Holtz's medium. This solution is filtered and sterilized. 

 The liquid is then poured into Eslen and Meyer's tubes, 

 and completed by the addition of iodide of potassium, in 

 the proportion of one part to one hundred. The culture is 

 then inoculated, and poured out on plates. The bacillus 

 coli and the typhoid bacillus are the only microbes which 

 will g-row in this medium. Within twenty-four hours 

 colonies of bacilli coli appear in luxuriant brownish 

 g-rowths; twenty-four hours later the typhoid bacillus 

 develops. This g-erm is easily distinguished as small, 

 finely granulated, transparent points. 



Bacteriological Investigations into the Etiology of 

 Keratitis and Conjunctivitis Eczematosa and Corneal 

 Ulcers. — Bach {Arch./. Ophthal., y.X\, 2), draws the follow- 

 ing" conclusions from his investig-ations {N. Y. Med. Jour.')'. 



1. Eczematous inflammations of the eye are caused by 

 pyog-enic micro-org-anisms, especially the staphylo-coccus 

 pyog-enes aureus. 



2. In recent processes the particular microbe can g-en- 

 erally be demonstrated. 



3. By implantation of pyog-enic bacteria typical artificial 

 phlyctenules can be produced in the cornea and conjunc- 

 tiva. 



4. The eczematous processes frequently coexisting- in 

 other parts of the body can be traced to the same cause, 



