rendeavour'd to tell tbolj Threads as they came ont 
-of the Body, buf could not, icr i:^ Ibme places I found 
Threads that were 25 times as Thick as others that lay 
next them, 
I caufed the Limner to look at fome of thefe Threads, 
as they came out of the Spiders Body, who was forced 
to own that there was no defcribing them either with 
Pen or Pencil, and that they could hardly be engraved 
on Copper Plates, however I have fenc them as well 
done as I could. 
Eigi 4. M N OP Q reprefents a part of the Threads^ 
which I think came out of but two of their working In- 
flmments^ and are divided from one another, juft as they 
iflued from the Body. 
Now, as we may perceive that a Spiders Web, which 
to our naked Eye feem but fingle, do yet confift of many, 
other Threads^ and thereby acquires a greater ftrength 5; 
we may from hence certainly conclude, that no Flexible- 
Bodies (excepting Metals, whofe parts are ftrongly ce- 
mented by the force of FireJ can attain to any degree of^ 
Strength, unlefs they confifl: of long united parts y and 
the more thefe parts are twifted together, or cemented 
#ith any Vifcous Matter, the ftronger they are, which is 
very obvious in Flax, or Silken Thread, Ropes, &c. 
And thus alfo Hair or Wool, according to its FinenefSi 
has more or lefs ftrength, becaufe each of thofe Hairs ^ 
confifts of longer and finer parts, which are not only, 
united by a Vifcous Matter to one another, but are alfo 
arm'd with a Skin or Bark, which does more flriftly joyn . 
the Contained Parts. 
Now if we ferioufly refleft on the infinite number of 
Fine Threads that at once proceed from the Body of fuch : 
a Spider, and the Reafon of the thing, we muft own that 
it ought not to be otherwife, for to make a Thread fo 
thick and ftrong as is neceffary in a Spiders Web, with 
the Vifcous Matter which for that purpofe is thrown out 
