DE. T. S. COEBOLD OK TRICHINA SPIRALIS. 209 



fed a dog witli part of this human flesh. On the morning of the 

 31st I killed the dog and examined the intestinal canal (at 11.30 

 A.M.), which revealed the presence of sexually mature living 

 Trichinae. The males (of one of which I retain an accurate figure) 

 displayed the characteristic bilobed caudal appendages, leaving no 

 doubt as to their source and nature. I have mentioned the pre- 

 cise time of the experiment, in order to show that a period of 

 sixty-nine hours proved amply sufficient for the develop mentof the 

 young muscle-fleshworms of the human subject into the sexually 

 mature adult Trichinae of the dog. 



Exp. 24. With another portion of this human flesh (taken from 

 the muscles of the tongue) in which the Trichinas were extraordi- 

 narily abundant, I fed a eat. In about ten days the animal 

 showed the most raarkfd symptoms of Trichinosis. It refused to 

 eat ; the eye lost its lustre ; the body became very thin, and I 

 thought the animal would die. By very great care, keeping it 

 warm before the fire, and subsequently inducing it to take a little 

 milk, the creature improved, gained flesh, and eventually reco- 

 vered. About three months afterwards I destroyed this cat, when, 

 on examining the panniculus carnosus, latissimus dorsi, and other 

 superficial muscles, I found great quantities of well-developed, 

 capsuled Trichinae. Although the animal had swallowed scarcely 

 a quarter of an ounce weight of infested flesh, yet thousands of 

 parasites had been propagated in its flesh, and a nearly fatal hel- 

 minthiasis setup. Dr. Thudichum, who saw the trichinized Grer- 

 man subject, estimated the number of parasites in his body at 

 40,000,000. I do not think this estimate likely to be exaggerated ; 

 for if all the flesh had been infested to the extent I found to obtain 

 in respect of the muscles of the tongue, I believe 100,000,000 

 would have been tolerably near the mark. In places, the point 

 of a needle could not be thrust between the capsules, so closely 

 were they agglomerated. 



Exp. 25. Erom the 19th to the 25th of April, 1866, inclusive, 

 daily admistrations of trichinous pork, in the form of bolus, were 

 given to a sheep by Mr. Pritchard. The Trichinae were from one 

 of our experimental animals at the Veterinary College, about two 

 ounces of the flesh being taken at each feeding. The flesh of the 

 sheep (destroyed in the following November) failed to give any 

 indication ,of the presence of the ofi'spring of these parasites. 



Exps. 26 and 27. About the same time, and occasionally at in- 

 tervals extending over a period of five weeks, Mr. Pritchard also 

 fed two young fowls with the same trichinous pork. Towards the 



