494 HISTORY OF GYSTICEKOUS CELLULOSE. 



hibited perhaps 2000 to 3000 full-grown bladder-worms, which, with 

 few exceptions, were confined to the peripheral muscles of the body. 



Fig. 277. — Measly pork (nat. size). 



The experiments which we have mentioned are not, however, the 

 only ones of the kind. Similar investigations have often been made 

 since, especially by Mosler^ and Gerlach,^ some of whose observations 

 we shall shortly notice more particularly. I have also been able to 

 give the results of some new feeding experiments.^ The results agree 

 in all points with the foregoing statements, so that there can no 

 longer be the slightest doubt regarding the relations existing between 

 the bladder-worm and Taenia solium. This might certainly have been 

 affirmed sooner, but any new idea makes but slow progress. Yet even 

 after these experiments had been made, not only by van Beneden but 

 by Haubner and myself, an attempt was made to weaken their 

 cogency by the objection that the investigators had possibly procured 

 the animals for their experiments from districts in which the tape- 

 worm disease was an epidemic.'' This is assuming, very unwarrant- 

 ably, that our conclusions are based merely upon the presence of the 

 worms after the feeding. On the contrary, whoever examines these 

 conclusions impartially will be convinced that their cogency is due to 

 a much greater extent to the constant correspondence of the degree of 

 development of the bladder-worms with the duration of the experiment. 

 The mere presence of the parasites might possibly be explained in 

 some other way, although the number of pigs infected with bladder- 

 worm could hardly amount anywhere to eighty or even more per cent,, 



^ "Helminthologisohe Studien und Beobaohtungen," p. 43, 1869. 



' Zweiter Jahresber. d. Ic, Thierarzncisch. Hannover, p. 66, 1870. 



" First German edition of this work, Bd. i., p. 745. 



* See Davaine, loo. cit., first edition, p. xxx. In his second edition, indeed (1877)i 

 Davaine abandons his hesitation. Even he now acknowledges the cogency of the feeding 

 experiments. But it is very strange that the most convincing one of all— namely, my 

 own — which is the only one that proves the development of the bladder-worms within the 

 same host (as before), is T^^f^fff^Q l^^f^/dftSBH^ ^^^^' 



