274 Tuer Microscope. 
Microscopr, has fowarded us a slide of selenite of his own mount- 
ing. The chromatic display is very fine. 
Pror. A. Y. Moore has adopted the novel plan of running his 
turn-table by steam-power. He writes us that his engine is about 
‘“‘ten-fly power,” and whirls the table at a very rapid rate. The 
entire cost of the outfit was $1.50. 
Tue February number of THe Microscope will contain a por- 
trait and’ sketch of Prof. Wm. A. Rogers, A. M., F. R. M.S., Presi- 
dent of the American Society of Microscopists. This number can 
only be furnished to subscribers, as no sample copies will be sent 
out. 
ABSTRACTS. 
BACTERIA AND DISEASE. 
T. J. BURRILL, PH.D. 
(CONCLUDED. ) 
HEN legislators and those in authority come to intelli- 
gently understand the duties devolved upon them from 
this same stand point of bacteria and disease, we shall be better 
able as communities to baffle the invaders and spoilers. When 
individuals learn what to do and how to do it, the triumph must 
be near at hand. Families and communities must protect them- 
selves against the injuries and diseases from poisonous foods and 
drinks by attention to their preparation and preservation, and by 
the rigid exclusion of dangerous germs. In the manufactories 
intelligent supervision must be demanded, in the markets faithful 
inspection and enforced purity rigorously insisted upon, and in the 
water supply especially, freedom from contamination insured. 
Against the inroads of the recognized contagious diseases we 
have offered quarantine regulations, the isolation of the diseased, 
and the consumption by fire of the disease-carrying products, 
together with the means now known of prophylactic vaccination or - 
inoculation and of germicidal sanitation and medication. As illus- 
trative I will rapidly conclude with two notable examples: 
Taking for our information a paper written by George Higgin, 
(“ Nature,” June 17, 1886, p. 149), compiled from the correspon- 
dence in the London Yimes, let us examine the relation of cholera 
