Tur Microscope. 211 
Pror. 8. Burscuit, (Morph. Jahrb. X. 1885) preserves Cilio- 
flagellata in picro-sulphuric acid, afterwards changing ,to alcohol. 
By this means the flagella are extremely well retained. The pos- 
terior flagellum was well observed after the action of osmic acid 
vapor; but a one per cent. solution caused it to disappear. 
Prorrssor Herinricw Fiscner, of the University of Freiburg, 
in Baden, who died last February, was a diligent student of micro- 
scopical minerology, and distinguished himself by his investiga- 
tions on the origin and character of jade, concerning which he pub- 
lished, in 1875, the book, “ Nephrite and Jade.”—Popular Science 
Monthly. 
PasreuR remarks in the course of his address that although 
his laboratory had for the past five years been devoted to the study 
of rabies, and had become, as it were, the center of all information 
and observation pertaining to this affection, he shared the universal 
surprise in finding how large the number of persons bitten by mad 
dogs actually was. 
As A special criterion of tubercle bacilli, Dr. Voltolini states 
that if cover preparations of phthisical sputum be laid in strong 
nitric acid (1.45—1.50 sp. gr.) before staining with the Ehrlich so- 
lution, the bacilli are afterwards found to have a granular monili- 
form appearance. The author considers this a special characteris- 
tic of tubercle-bacilli, as he has not found it in any other micro- 
organism, not even in the Lepra-bacillus. 
To sHow the intercellular substances in the vicinity of the 
nuclei of Schwann’s sheath, Dr. A. Gruenhagen teases out the 
nervous ischiadicus of the frog; then pours over the preparation 
for two or three minutes some drops of a half per cent. solution of 
silver nitrate. He then washes in H’O, dehydrates in absolute al- 
cohol, stains with concentrated haematoxylin, dehydrates again, 
and mounts in balsam.—Jr. Royal. Mic. Soc. 
Tartar found upon the teeth is composed chiefly of earthly 
phosphates and carbonates,, with which is mingled a certain pro- 
portion of organic matter, epithetial scales, fatty particles, filiform 
fungi, vibrios and monas. According to Mr. Bland Sutton, accum- 
ulations of tartar occur on the teeth of monkeys, kangaroos and 
lemurs, at the garden of the Zoological Society, London, and is an 
occasional cause of death from septic pneumonia.— Archives of Den- 
tistry. 
