upon the Structure and Oeconomy of Tania. E 57 
which ties together a number of plants that are in other refpeds 
independent of each other: they become perfectly independent, 
and continue their exiftence without any inconvenience, after thefe 
connecting roots are divided ; in this circumftance there appears to 
be fome analogy between thefe plants and the tape worm. In the 
common potatoe there is a mode of increafe, by forming a number 
of bulbs at the root, which is totally independent of fexual genera- 
tion ; thefe bulbs become feparate individual plants after a year, and 
are then independent of their parent. Something fimilar takes place 
in the Tulip, and in the Sempervivum globiferum, where there is a 
modeof increafe by forming clufters of leavesthat in time are pufhed 
off by fucceeding leaves; thefe bulbs of leaves, having each a fmall 
root, take hold of fome neighbouring earth, and become diftinét 
beings: this natural operation is fomething like the artificial mode 
of UE ogah be oag 
| h teftinal worms produce a difeafed ftate of the animal's 
body which thej RE abit, various romedies are itc for removing 
them, many of which are ineffectual, and others very injurious by 
the violence of their operation. Draftic purges feem to operate 
upon zie, partly by irritating the external furface of their bodies, 
fo as to make them quit their holds; and partly by the violent con- 
tractions produced in the inteftine, which may fometimes divide the 
bodies of Tæniæe, and even kill them by bruifing. I would here 
propofe the trial of a fimple remedy, which (a priori) promifes to 
be fuccefsful; I mean fmall fhocks of ele&ricity paífed frequently 
through the regions of the abdomen ; the lives of the lower orders 
of animals feeming to be cafily deftroyed by fuch fhocks of electri- 
city as do not injure the larger and more perfect animals. 
In Mr. Goeze’s very elaborate and important Hiftory of Worms, 
he has reprefented many fpecies of Tania. The heads are drawn 
very accurately, and elegantly engraved; but he has reprefented 
Vor. IL L l the 
