210 OriginalabhandluDgen. 



Trealment. This is the sauie as for Trichosis fellms. 



History of Investigations. Without troubling the reader with 

 the tedious details of the investigation, I will here briefly state 

 that these diseases were first recognized by myself to be peculiar, 

 in the summer of 1864; while treating them in an orphan 

 assylum, whose some thirty small boys were affected with them. 

 During the following year quite a number of cases of the same 

 character were under my care. It was not however till July 

 and August 1866 — that I commenced studying these diseases 

 with the view of tracing them to these true souice. I had noticed 

 that in most families where they prevailed, the children were 

 playing with either kittens or young dogs, or both. In every 

 instance I found the little animals with diseased faces. On com- 

 paring the raucediuous growths on the diseased animals and 

 children ; they were found to be apparantly identical in the shape 

 of the shores and the arrangement of the filaments among the 

 epidermic cells. My next experiment was to procure a number of 

 diseased kittens, and distribute them to families where there were 

 no cats or dogs and where the children were all free from 

 skin disease. In every instance, in from five to ten days after 

 the children began playing with the diseased kittens, they com- 

 menced breaking out with the eruption. The next step was to 

 inoculate myself with the spores of this fungus from the cat. 

 In about three days they began to develop rapidly, and send out 

 filaments in all directions among the epidermic cells, producing a 

 disagreable itching and forming circular and oval patches of 

 eruption precisely like the disease previously described. The 

 eruption yielded readily to treatment. 



I now inoculated myself with the spores from the patches 

 of Eruption on a child, to whom I had given about two weeks 

 before a diseased kitten. The characteristic eruption followed, 

 extending in all directions from the point of inoculation. Many 

 other experiments were performed connected with the disease, 

 both on the cat and dog, a detail of which would here be un- 

 interesting and unnecessary. 



Concluding Remarks. It is a singular and instructive fact, — 

 that the low types of vegetation that develope in the fermenting 

 animal secretions, — (when apart from the animal body), — 

 do not possess the power of growing, — as a general rule, — upon 



