Tur Microscope. I27 
cent delivered a most cordial and eloquent address of welcome to 
the society, and gave a resumé of the work done at Chautauqua. 
Engaged as the doctor is with this work, and as many of the 
schemes have emanated from his active brain, his description 
proved highly entertaining to our members, who were surprised 
at its immensity and the number of persons in distant parts of the 
country who were being benefitted by its teachings. 
President Burrill on behalf of the society thanked Dr. Vincent 
for his hearty welcome, and assured him of our earnest sympathy 
in their methods of progressive education—that we felt that it was 
good to be here and would leave with enlarged ideas of the “ Chau- 
tauqua University.” 
Prof. Burrill then proceeded with his address on “ Bacteria and 
Disease ” a very comprehensive and clearly presented paper.* 
Wednesday proved to be a very interesting day. After the 
admission of new members, an interesting paper by Dr. R. H. 
Ward was read on “ Micrometer wires,” which described how fine 
wire could be made, by making a pencil of silver enclosing a core 
of platinum and drawing it down to one five hundredth of an 
inch: that when the silver is dissolved off with acid the platina 
wire is found to be one five thousandth of inch in size, even through- 
out, and much preferable to spider-web for micrometer, as it is 
more distinctly seen and more durable. 
Dr. Geo. Fell’s paper on “‘ Demodex Falliculorum ” followed 
and elicted considerable discussion. Though so commonly present 
in the human face, it has not been considered to be the cause of 
any eruption or disease, but Dr. Fell is inclined to think, that the 
mite is perhaps the real cause of a common skin disease like acne. 
Mr. Vorce stated that he had examined pork flesh and found a 
demodex with pointed extremity, as illustrated in Dr. Fell’s draw- 
ings and that he understood the Demodex Falliculorum to have a 
rounded extremity, but Dr. Fell insisted that it was the exact form 
he had found in many cases of both men and women and that it 
was not due to effect of any re-agent. 
The afternoon session opened with “A Reply to some Argu- 
ments that have been advanced against the Comma Bacillus of 
Asiatic Cholera,” by Dr. Geo. W. Lewis, of Buffalo. The doctor 
delivered a conclusive argument sustaining Dr. Koch. Having had 
* See September MIcROSCOPE. 
