64 PARASITES OP MAN 



which Perroncito sought to establish, Professor Pellizzari 

 makes further use of quotations which bear upon the question 

 as to whether the quality of the vessels in which the fat of 

 diseased hogs is melted down may not largely affect the degree 

 of high temperature sought to be obtained (in view of a perfect 

 destruction of the Cysticerci). Perroncito repeatedly witnessed 

 the operations of pork-butchers ; and when portions of meat 

 were introduced, with water, into the cauldrons, he always saw 

 that the temperature " was maintained between 97 and 98 

 Centigrade." However, this part of the question may be dis- 

 missed in a very few words, since Perroncito himself finally 

 allows that " the different composition of the vessels cannot 

 elevate the temperature of the fat by many degrees." 



With the praiseworthy intention of either verifying or refuting 

 these conclusions, Pellizzari, with the approval of Bosi and 

 with the assistance of Tommasi, instituted a fresh series of 

 experiments at a private laboratory. The details of these 

 experiments are exceedingly interesting; but as their record 

 occupies several pages of Tommasi's appendix already referred 

 to, I must content myself with a general statement of the results 

 obtained. Professor Pellizzari found that Cysticerci, so far 

 from requiring a temperature of upwards of 100 Centigrade 

 for their destruction, die at a temperature of 60 Centigrade 

 (140 Fahr.). He had, it appears, previously taken the initia- 

 tive in recommending certain measures to the Florentine 

 municipality, in view of protecting the public health, and he 

 had now the satisfaction of more than confirming the wisdom of 

 these sanitary precautions. In excessively measled animals the 

 fat is removed and boiled in suitable cauldrons, and has potash 

 mixed with it to render it useful for industrial purposes. By the 

 various measures adopted the entire animal is utilised, and with 

 proper precaution there seems little chance for the measles to 

 arrive at the taenioid or sexually mature condition. 



In the next part of his communication Pellizzari touches upon 

 the question of measles in beef, referring especially to the 

 experimental labours of Leuckart and myself. Finding addi- 

 tional support from our views Pellizzari declared the proposi- 

 tions of Dr Perroncito as of no value whatever. " But how is 

 it," he adds, " that notwithstanding that so low a temperature 

 suffices to kill these Cysticerci, yet cases of Taenia are continu- 

 ally occurring ?" The answer to this question will appear in 

 the sequel; but meanwhile it will be as well to refer to the 



