176 
M. TOTTSSAINT. 
with paraffine or wax, and the preparation may then be kept for 
an indefinite period. 
The manipulations, however, require some precautions. The 
potash having the property to separate and soften the elements, 
care must he taken to avoid disturbing or moving the glass cover 
while examining the specimen, or they may be entirely spoiled, 
though once in the solution of acetate of potash, the elements will 
regain some of their consistency. * * * * * 
We employ this process in coloring the microbs of liquids; in 
urine for instance. It is sufficient to add one drop of the liquid 
to be examined to two or three of the alcoholic solution of eosine 
—to leave it alone until all the liquid has evaporated—to add 
again one or two drops of the solution of potash, 40 per cent, or 
the solution of acetate of potash, and the preparation will be de¬ 
tected in their clearest condition .—Gazette Medicate. 
ZOOLOGY, 
©ON THE VITALITY OF TRICHINAE ENCYSTED IN SALTED MEATS. 
\ By M. Toussaint. 
We learn from the researches of the author, that in salted 
preparations of at least fifteen months old, trichinae are not only 
seen alive, but have rapidly passed through their entire changes 
in the digestive canal of a new liort, and produced in him fatal 
accidents. 
He remarks that u one cannot affirm that the action of salt is 
sufficient to kill the trichinae rapidly and with certainty; they 
may die in salted meats as well as in any other medium, and that 
this explains the negative experiments published by some distin¬ 
guished observer. 1 But they may also Jive in it for a consider¬ 
able time, without our being able to determine what may be the 
duration of the period necessary for death to succeed to the latent 
life. It is well also to repeat the fact that salting too often fails 
to kill trichinae, and has also the effect of rendering their detec¬ 
tion more difficult. The old experiments of Day ere made this 
fact probable. The recent researches of Laborde made it evi¬ 
dent .—Gazette Medicate. 
