CYSTICERCUS CELLULOSE. 121 



of the size of a hemp-seed, with a central turbidity, i. e. the 

 commencement of the head. The second pig was killed on the 

 9th August, when thousands of Cysticerci were found in all 

 parts of the body ; the largest individuals were as large as peas, 

 and exhibited a distinct head, whilst the smallest were only of 

 the size of a hemp-seed. The third pig, which was killed on the 

 23d of August, was uniformly set throughout all parts of the 

 body with Cysticerci of various degrees of growth and develop- 

 ment. The largest were almost perfectly developed ; others re- 

 sembled those last described. I undertook the examination of 

 a weighed piece of the flesh, and found 133 Cysticerci cellulosa in 

 4J drachms of it. If we calculate from this quantity the number 

 of Cysticerci which would have existed in 1 stone or ^th cwt. of 

 the pork, we obtain the great number of 88,000 individuals in 

 this weight. A fourth pig, of the same litter, to which no Tania 

 had been administered, exhibited no traces of Cysticerci on 

 dissection. 



A fragment of a Tcenia solium which had passed off sponta- 

 neously, was given, almost by mistake, to a sheep, but it did not 

 succeed in making the animal measly ; nor have Professor 

 Haubner and I been more successful in rendering dogs measly 

 by the administration of Tcenia solium, as was previously done in 

 the year 1851. 



It is of no consequence to us at present why the first two pigs, 

 as well as the dogs and the sheep mentioned, were not rendered 

 measly. We do not yet know the circumstances exactly, which 

 facilitate or hinder the production of cystic worms in general, 

 still less in one particular case ; nevertheless it is evident that 

 the causes of this might lie either in the animal experimented on, 

 (in its age, its feeding, or its personal immunity from cystic 

 worms), or in the tape-worm administered, (whether its young 

 were perfectly developed and healthy, or more or less weakened, 

 or perhaps even killed, by the medicines). Especial interest 

 attaches to the third series of experiments, which refers to these 

 examined pigs of one litter, to which the same Tania were 

 administered and which all became measly. It is to this last 

 circumstance in particular that Professor Haubner thinks, and I 

 agree with him, that we must lay the most weight. The occur- 

 rence of Cysticerci in all the animals fed with the same material 

 is the main point, and is of the greatest value and interest to us. 



