84 - BOARD OF AGRICULTURE. 
lungs, heart, and other organs, and cause for a time great irri- 
tation and inflammation of these and other parts by their move- 
ments in forcing and boring passages for themselves in the 
tissues ; but they all eventually perish, while still small, in 
such localities, and those that get into the liver and abdomi- 
nal viscera are the only ones that survive and develop to their 
full size, becoming the water-bladders, or ‘“ Cysticercus tenu- 
icollis,” first described. 
The complete history of this, like the other tape-worms, 
previously described, has been ascertained beyond doubt by 
direct experiment. In this case the water-bladders have been . 
given to dogs, and at the proper time the dogs have been killed, 
when the mature tape-worms have always been found corres- 
ponding in number to the number of water-bladders eaten, 
and in size to the length of time. And then the eggs or joints 
of the tape-worms have been given to lambs; and although 
such lambs generally die in the course of five or six days, 
when they swallow large numbers, yet even in that short time 
the young worms have been found in vast numbers already 
distributed in the system; but when only a few eggs are em- 
ployed, they do not cause immediate death. And in this way 
Prof. Leuckart has studied their complete development. This 
tape-worm, in its mature state, does not inhabit the human 
body. Dr. Moller even swallowed several of the living blad- 
der-worms without any result. 
When these young worms have once got into the system of 
a sheep, there is noremedy. In this case, prevention is our 
only hope; and to this end the same means should be used as 
against the Tenia cenurus and T. echinococcus, to be de- 
scribed farther on. Especial care should always be taken to 
destroy the water-bladders and all other parasites observed in 
slaughtering animals, as well as those removed from living 
animals by medicines or surgical operations ; for in many cases 
the eggs are capable of retaining their vitality for many weeks 
or months. They should never be thrown aside as harmless, 
or even buried, but should be destroyed by scalding hot water 
or fire. Much may be done, also, in diminishing the numbers 
of this and other parasites doy, frequently doctoring those dogs 
