90 The Trichina Spiralis. 



upon the limbs caused him to cry out in agony. This 

 was his condition when I saw him last. 



By means of a small instrument, which I had constructed 

 for the purpose, I removed a little piece of muscle from the 

 shoulder of the eldest boy, which I have examined under 

 the microscope, and find studded with trichina} which 

 are coiled up and quiescent, preparatory to becoming en- 

 cysted. The younger boy was so tender to the touch that 

 I was unwilling to submit him to the pain of the opera- 

 tion. 



Note. — Since the above paper was read before the Insti- 

 tute, the younger boy has died, and a microscopic exa- 

 mination of the muscles showed them to be everywhere 

 filled with Trichina}, in some of them enveloped in a newly 

 formed cyst, and others free and full of life and motion. 

 In order to give some idea of their number I may state that 

 I counted forty-one trichina} in a single field presented by 

 a lens of one-inch focal distance. 



