TRICHINIASIS OF MAN AND ANIMALS. 



33 



moval in no way interferes with the value or appearance of the 

 dressed hog. 



Although a power of fifteen to twenty diameters is sufficient to 

 demonstrate the presence of trichinae to a proficient examiner, still 

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



Fair microscopes, but by no means as convenient as the Hartnach 

 model of Continental makers, 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 fibers, and with a 

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



V '« 



fji#Mtfyy^ k ii'« 



Fig. 1. — Fresh Trichinocs Invasion. 



Fig. 2. — Normal Encapsuled Trichina. 

 (Leuckart.) 



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. 



