496 HISTORY OF CTSTICEECUS CELLULOSJ*). 



provided with hooks. Although these forms were in Kiichenmeister's 

 opinion indubitably derived from Cysticercus cellulosce, jet, consider- 

 ing the different species used in feeding, and the slight development 

 of the Tmnice found, and the striking smallness of the number, some 

 doubt as to the cogency of the argument is not unreasonable. 



Thus it seemed very desirable that such experiments should be 

 repeated, and an opportunity soon offered. A young educated man 

 of about thirty years of age, and of healthy constitution, to whom I 

 had explained the development of the tape-worm, offered himself in 

 the interest of science as the subject of experiment. He swallowed 

 in my presence four bladder-worms, which I gave him in luke-warm 

 milk, after cutting off their caudal bladders. Two and a half months 

 afterwards he observed in his stools detached segments of a tape- 

 worm with which he had never before been troubled. The experi- 

 ment had tlius succeeded, and four weeks afterwards I examined two 

 worms about 2 metres long which had been voided by the patient 

 after a few doses of cousso. Only one of these had a head, which 

 of course exhibited the structure of Tcenia solium.^ 



I made two other experiments, each time with twelve bladder- 

 worms. The one case was that of a man bribed by money, who 

 suffered from Bright's disease ; the other that of a consumptive 

 patient suffering from profuse diarrhoea, who served unconsciously 

 as the subject of experiment. Both were without result. 



According to the memoirs of van Beneden and Davaine, a student 

 in Geneva, Humbert by name, made a similar successful experiment 

 upon himself. Before the eyes of Vogt and Mouhnie, he swallowed 

 fourteen bladder- worms from the pig, and voided the first proglottides 

 during the lapse of the third month. After taking a purgative, the 

 patient remained for a long time apparently free from his worm, but 

 some months later he again noticed the expulsion of proglottides. 

 These exhibited, as before, all the characters of Toenia solium.^ 



Similarly Hollenbach, who swallowed a teaspoonful of bladder- 

 worms, expelled five months afterwards a piece of tape-worm five 

 feet long, with many joints, but without the head.* It was referred to 

 Tcenia serrata, but must have been the ordinary human tape-worm, 

 being designated as above only on the authority of v. Siebold, who, as 

 is well known, denied for a while the specific distinctness between the 

 large-jointed Tcenia of man and of the dog (p. 405). 



* "Blasenbandwurmer," p. 58, 1856. 



' So Bertolua reports "Dissert, sur les m^tamorph. des otetoides," (Thfeae de Mont- 

 pellier, No. 106, December 1856, cited by van Beneden, "Zool. m^d.," t. ii.). 



' Woohcnschnft d. Thicrheilkunde u. Vidizucht, Adam and Nililas, Bd. ii., pp. 301 

 and 353. 



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