1 12 
Vf the Snail. 
Of animalcules in the teeth. 
T HESE are to be found in great numbers of dif¬ 
ferent kinds, in the whitifh matter that flicks be¬ 
tween the teeth of men, women, and children e ; but 
efpecially between the grinders, although they wafh their 
teeth frequently ; but from people that are more carelefs, 
a fort of eels are found. The firft fort A, fig. 174. move 
along very fwiftly, in fpittle or water without bubbles. 
The fecond fort feen at B, fig. 174. move in the direction 
of the doted line. The third fort is feen at E, and the 
fourth fort at F. 
They all die if vinegar be put to them; from whence 
it feems probable, that if the teeth and gums be frequently 
wafhed with it, it may be a means to preferve them, 
from thefe creatures. 
Of the fnail. 
T HIS flow paced flimy animal hath many curious 
obfervables. The firft are its four eyes, like atra- 
mentous fpots, fixed at the ends of its horns, or rather at 
the ends of thofe black filaments, or optic nerves f that 
are fheathed in its horns, which it can thruft out, draw 
in, turn, or diredl as it finds occafion. If when the 
horns are fully extended, you nimbly clip off their 
extremity, and place them before the microfcope, either 
upon the objedt carrying glafs, or flick the end of 
them with a little turpentine to the point, they may 
Yery eafily be examined in the microfcope, with all 
the 
* Leeuwenhoek’s Ex. & Con. p.40. Tom. iv. s Power's 
Micro. Obf. p. 36. Speft. de la Nat. Dial, ?d. 
