TRICniNIASIS OF MAN AND ANIMALS. 



33 



moval in no way interferes witli tlie value or ajipearanee of the 

 dressed lio<;f. 



Although a power of fifteen to twenty diameters is sufficient to 

 demonstrate the presence of trichinte to a jirofieient examiner, still 

 it is much easier and safer to use one of from fifty to seventy-five. 



Fair microsco2>es, but by no means as convenient as the Ilartnach 

 model of Continental makei*s, are to be had from Americans at from 

 fifteen to twenty dollars. A large table to the microscope is a con- 

 venience. 



A few glass slides, or object-glasses, and some strong covering- 

 glasses, a pair of small curved scissors, and two teasing-needles, are 

 all that is necessary to complete the outfit. 



The first step is to take a piece of muscle and cut into its sub- 

 stance, in order to have it as moist as possible, and with the curved 

 scissors cut several thin slices lengthwise to the fil)ers, and with a 

 needle place them on the object-glass a little distance apart; the 



,rf'f.'':Cit/' • ' rr/r ■■ 



I 



Fio. 



Fio. 1. — Fresh Trichinous Invasion. 



^Leuckan.; 



covering-glass is then to be placed upon them and gently pressed 

 with a slight, rolling motion, which will invariably make the speci- 

 mens thin enough for examination. 

 3 



