EXTRACT'S FROM FOREIGN JOURNALS. 
453 
scope, the little animal was seen moving spontaneously when the 
heat reached 40°. 
2. In coloring the preparation with the bine of aniline, the 
violet of methylanihile, or the picrocarminate of ammonia, the 
trichinae remained transparent and would not become colored for 
several days. But if the blade porte object was strongly heated, 
the trichinae after moving rapidly, would make a quick motion, 
become immovable, and would color rapidly. 
3. Five young birds were fed during eight days with trichin- 
ous meat, first unsalted. In the foeces and intestines of these 
birds a large number of living trichinae were found. 
The freezing was carried to 20° in one instance, and to 15° in 
another. In the first case the meat remained exposed for four 
hours to a dry cold of 27°, and in the second to a cold of 20° for 
six hours. The temperature was indicated by an alcoholic ther¬ 
mometer placed in the center of the ham. 
The cold was obtained by the apparatus of Carre, analagous 
to that of M. Mignon and Rouart, which produces a cold of 20° 
and 25° in a circuit of about twenty cubic meters. 
The examination of the frozen meats has shown that all the 
trichinae they contained were dead. The means used for this ob¬ 
servation were the same as the preceding, and the results of the 
examination are as follows : 
1. Under the influence of a moderate heat, the trichinae show 
no motion. When heated more they show the same passive move¬ 
ments as muscular fibres. 
2. Submitted to the action of the coloring substances above 
named, they became strongly colored in a few minutes. 
3. Five young birds of the same family and same age as the 
others, were fed for an equal length of time with the same meat 
which had been frozen. In the foeces, and equally in the intest¬ 
ines of these birds, the most careful microscopic examination failed 
to reveal the presence of one single trichina. Cold had killed 
them, and digestion had removed them as lifeless organic elements. 
It seems settled that the temperature of 0° is certainly seriously 
injurious, if hot fatal, to trichina. Indeed, fragments of meat, 
infected with these nematoids living, were closed between two 
slides of glass and placed in melting ice for six hours. After 
