202 THE MICROSCOPE. | 
resenting pathological specimens, as seen under the microscope, 
by photography, is much to be desired and it seems that such a 
system will very shortly be perfected.”—-The photo-micrograplis of 
pathological sections which we have seen in this country have not, 
as a rule, been successful,—but we see no reason why, with prop- 
erly prepared specimens, pathological objects should be more diffi- 
cult to photograph than normal objects, etc. 
THE work done at the working session of the A. 8. M. this year 
was never excelled. At the forty tables, nearly every department 
of microscopy was demonstrated. This feature of our meetings is 
of great practical importance to microscopists, and the results are 
already becoming evident. 
/ 
Pror. BurriLu’s address before the American Society of Mi- 
croscopists is the ablest summary of bacterology that we have ever 
met with. Our abstract will run through several numbers of THE 
Microscopr, and we trust that our readers will give it careful 
perusal. 
ABSTRACTS. 
BACTERIA AND DISEASE. 
Abstract of the Annual address delivered Aug. 10th., before 
the American Society of Microscopists, by T. J. Burrill; Ph.D., 
President. 
Fellow members of the American Society of Microscopists : 
I am to address you to-night upon a class of living things of 
whose very existence nothing was known nor could have been 
known except by the aid of the microscope. Since the latter, 
though now perhaps the most nearly perfect instrument of man’s 
mechanism, is of recent origin, the minute organisms of which we 
speak are new to human knowledge. In fact no considerable at- 
tention was paid to them until within the memory of the majority 
of the members of our society, about thirty-five years ago. The 
‘classic researches of Schwann, of De la Tour, of Pouchet and es- 
pecially of Pasteur, upon fermentation and spontaneous germina- 
tion at length, caused careful studies to be made upon these, the 
least in size of nature’s animated existences. Then the observed 
