90 TRICHINA SPIRALIS. 
acetic acid* and glycerine is placed on the lower plate and spread 
by means of needles, fixed in wooden handles, or by means of a 
W.FORD. 
Fig, 9. 
camel-hair pencil or brush. The upper plate is then brought down 
upon the lower one, and the screw is turned into the slot in which 
it fits. By turning the nut, s, Fig. 7, any degree of pressure may 
be brought to bear on the flesh, which may thus be rendered so thin 
and transparent that any trichinze present will be readily visible. 
We have tried several of these instruments, and find them not only 
all that can be desired for this work, but so simple in their use that 
any butcher’s boy can learn to use one. 
With such appliances at command, and with the knowledge which 
-we have of the life history of the trichina, it seems to us that there 
can no longer be any excuse for a case of trichinosis in the human 
subject, and very stringent enactments should be passed looking to 
the utter stamping out of this pest. 
*Great care must be taken to see that strong vinegar, containin 
vinegar eels (anguilula aceti},is not used. There are cases on recor 
where these vinegar eels, derived from the liquid used to moisten the 
specimen, have been mistaken for trichine. 
