C 475 3 
Eight, Ten, and Fourteen Pieces ; and all, or almoft 
all, recovered both Heads and Tails. 
In fhort, to Ay ftill more, I cut fomc of them, 
even in the midft of Winter, into Twenty-four and 
Twenty-fix Parts : Of the Firft Divifion into Twenty- 
four, there are about Sixteen or Seventeen, full of 
Life, and moft of which begin to complete themfelves. 
Of the Second Divifion into Twenty-fix, there ftill 
remain Seven or Eight. 
Since my writing what is before, fome of thefe 
Pieces of Worms have perifhed, though they had 
begun to complete themfelves. I have Reafon to 
believe, that, when I fhall repeat my Experiments in 
a warmer Seafon, more of the Pieces will thrive, and 
become complete Animals: It was proper, however, 
to try them in Winter, to fee the Difference of their 
Succefs and Progrefs. It is worth Notice, that lome 
very fmall Parts bf thofe Two Worms, one ot which 
was divided into Twenty-four, and the other into 
Twenty-fix Pieces, lived about Three Months, and 
that in the Winter. For though they were in my 
Clofet, yet the Liquor in M. Reaumur s Thermo- 
meter did moftly Hand between Four and Eight De- 
grees above Froft, which Degree of Warmth is very 
inconfiderable; and often, particularly in the Night- 
time, it was Two or Three Degrees lower. 
It is commonly One or Two Days after the Ope- 
ration in Summer, but about Ten or Twelve in 
Winter, that the Head and the Tail begin to {hoot 
on thofe Parrs where they were wanting. The Head 
fhews itfelf firft, and lengthens itfclf continually, for 
a Week, or more, till it has attained the Length of about 
a Line and half, and then it ccales to grow. I do 
Q q q 2 not 
