252 THE MICROSCOPE, 
Loneeyity or Microzes.—Micro-biologists have not yet been 
able to decide the important question as to how long micro-organ- 
isms retain their vitality. Their wonderful proclivity to prolifer- 
ation leads us to suppose that the life of one of these minute bodies 
is not longer than a few days or a few weeks at most. But clinical 
facts do not support this supposition. It is well known that the 
poisons of scarlet fever, measles, diphtheria and other diseases may 
remain active for many months in rooms that have been occupied by 
patients suffering from these diseases.— Weekly Medical Review, 
May 18, 1889, p. 543. 
Tue heirs of the late M. Chevreul have presented his library of 
10,000 volumes to the Paris Museum of Natural History. 
I coup fill a volume with the adulterations which I have found 
within a few years past in articles of food and drink in common use, 
by microscopical and chemical analysis.—Piper. 
I was examining the circulation of a frog’s lung by means of 
the Holmgren apparatus. I happened to so focus my lens that all 
the outlines of the capillaries and blood corpuscles disappeared, 
leaving visible only the spaces between the epithelial cells. | Never- 
theless there remained a vision of the streaming movement of the 
invisible blood through the ramified spaces. The stream was so 
rapid, so energetic, so ceaseless, it seemed as if it were pure motion 
or force divorced from the accidents of matter. The microscopic 
shred of tissue from the insignificant animal seemed for the moment 
to give a glimpse of a mighty vision of endless life, streaming with 
infinite energy into the minutest particles of an infinite universe. 
The impression was indescribably powerful.—Mary Putnam Jacoby. 
D. Perri, who was formerly keeper of the Hygienic Museum in 
Berlin, has been appointed chief of the Bacteriological Department 
in the Imperial office of health. 
THE microscope extends the realm of Pathological anatomy to 
the limits of the invisible world.—Hualey. 
Wuartever, then, makes it possible, safely, easily, and without 
pain, to remove (morbid growth) for microscopical examination a 
sufficiently extensive piece of the mass to show its deep as well as 
superficial structures, is of much practical value-—R. S. Conner. 
Tue typlion bacillus will live and increase in decomposing fecal 
masses for fully four months. They gradually decrease at a tem- 
perature of 50° F., but increase at 63° F. Cholera bacillus, on the 
other hand, is easily destroyed, and will only live in fecal masses four 
days at longest. 
