80 THE AMERICAN MONTHLY [Mar 
alternating horizontal discs nearly filling the lumen. The. 
milk thus follows a zigzag course through it. Tests with 
animals inoculated with milk infected with enormous 
quantities of bacilli and then sterilized in this manner, 
showed that not one of the bacillihad remained alive. Jun- 
dell uses it with the “G. Salenius radistor,” which enables 
the butter to be made at once from the cream without fur- 
ther delay or manipulation. —Nordisht Medtciniskt Arkte 
(Stockholm), August 9. 
UsE OF THE MILK THERMOPHORE, he Paul Sommer- 
feld says that milk kept in a thermophore for five hours 
is as free from bacteria as sterilized milk. Tubercleand 
typhoid bacilli are rendered innocuous by this time. Pre- 
viously sterilized milk placed in the thermophore is rend-. 
ered absolutely free from germs in five hours.—Berliner 
Klinische Wochenschift, Oct. 1, 1900. 
MICROSCOPICAL MANIPULATION. 
CANADA BALSAM AND PINE TURPENTINE COMPARED.— 
From an investigation carried out by Tischtschenko (Chem. 
Zeit.) it seems that the turpentines of the fir and of the 
pine are very nearly identical in composition and proper- 
ties—that the products of both substances have identical 
proprieties and qualities, and that the resins are in all re- 
spects the same, even to the indices of polarization. The 
investigator, therefore, concludes that pine resin may be 
substituted for Canada balsam in all cases. 
- This statement may be, and probably is, true of the tur- 
pentines of European pines (Pinus larica, P. silvestris, P. 
pinaster, etc.,) but we scarcely believe it to be true of the 
produceof the Southern long-leafed pine (Pinus australis). 
At any rate, some mounts made with virgin turpentine of 
the long-leafed pine, treated in all respects as the Cana- 
da balsam in preparing it for a microscopical mounting 
medium, soon spoiled, becoming granular and opaque, It 
