THE MICROSCOPE. LE 
ware dealers as a washer. About a dozen thicknesses of cardboard, 
4 inehes square, are put between the iron and wood, and held 
tightly by the two screws. 
The face plate is rapidly revolved, and with a thin knife, espe- 
cially made for the purpose, a dise is cut from the center of the 
cardboard, and then cells for 4, 2, { and { inch covers cut, consecu- 
tively, the outside circle of } inch being the inside of the 2 inch—a 
dozen of each size are thus cut off at one operation. 
When ready to mount select a cell of necessary size, put slide 
on turn table, and revolving the table, spread with the glass rod 
some benzole balsam in a circle somewhat larger than the ontside 
diameter of the cell to be used. If balsam is thin the cell becomes 
readily saturated and drops, or can be pressed down to contact with 
the slide. 
Place object in position, and fill cell rounding full with balsam, 
and carefully cover. There should be balsam enough outside the 
cell to fill up the space to a true level, and this balsam can be turned 
up to a true circle with a knife blade and leave little or no cleaning 
to be done. 
After a few days for hardening, cover with Brown’s Rubber 
Cement. To many this makes the most desirable finish, but after a 
time other cements can be added according to taste. 
IRON CITY MICROSCOPICAL SOCIETY. 
HE most interesting exhibit at the last meeting of this society, 
held February 12, was a slide prepared by Professor Webb, of 
the University of Pennsylvania, and exhibited by Mr. C. G. Milnor, 
with a ;', objective and C eye-piece. Dr. Webb had been called in 
consultation on a case which had puzzled many physicians in Phila- 
delphia. The case was that of a young lady, 19 years old, who in 
September last complained of not feeling well; the appetite and 
sleep were fair, and the lungs clear, making it a difficult case to 
diagnose. Finally Dr. Webb noticed a slight cough, which was so 
slight that under ordinary circumstances it would not have been 
noticed. He took some of the mucous brought up, made from it a 
slide, and his first glance at it under the microscope, revealed, not 
only the diagnosis, but also the prognosis of the case. He found 
the Bacillus Tuberculosis, indicative of Acute Miliary Tuberculosis; 
two weeks later the young lady was in her grave. 
This case is a proof of the great utility of. the microscope in 
medical practice. 
