43° 



General Notes. 



[May, 

 of the great articles of export 



fering with the distribution of 

 from this country, it became a 

 cial importance, there arose a need for some means by which 

 unscientific persons, acting merely in the interest of trade, could 

 determine with facility the presence or absence of these parasites. 

 A thorough examination of the pork offered for sale must not 

 only prevent the use of that which is dangerous, but also show 

 the gross exaggeration of the prejudice recently excited against 



this article of food. Perhaps no means is so available for this 

 purpose as the trichinoscope produced by the Bausch & Lomb 

 Optical Co., of Rochester. This instrument consists of a com- 

 pressorium with a magnifying arrangement so mounted that it ^can 

 be easily slid over the whole surface of the fragment of flesh which 

 has been flattened between the glasses. In the form shown in 



