(§75) 
imagine) that they may not receive any damage, when 
the Spider creeps into any hole where there is no occafi- 
on of making his Web, or wlien he runs along the 
ground in queft of his prey. 
Now if one feparates the above-mention'd four Inftru- 
ments, one fhall find four other lying between them, 
which contain within them yet fmaller and flenderer In« 
ftruments, from each of which proceed exceeding fine 
threads. 
After that thofe four Inftruments have been differed, 
in order to expofe to ones view what lies inwards, the 
Scene is as of a large Field, cover'd with an infinite num- 
ber of pointed Twigs, and each delivering out a fingle 
•Thread: Thefe Inftruif^ents are double, and may be com- 
pared to a Reed that is thicker at bottom than at top, 
out of which proceeded another, the biggeft end where- 
of was incafed within the fmaller end of the former, and- 
out of the fmall end of this laft came out a Thread of 
an extraordinary finenefs. 
Sometimes it happened to me, that I could not difco- 
yer the Working Inftraments in fome of the before-men- 
tion'd parts ^ which I fuppos'd to be, tliat, when the 
Spider did not employ them \n making his Web, they 
were (hut up, and then I could fee nothing in the place 
where they ufed to come out, but fmall Points or Tips 
of them, but with a little fqueezing, they ^ appear d pre- 
fently in great numbers. 
I obferv'd alfo, that fome few of thofe parts, from 
whence the Threads proceeded were larger and longer 
than the reft, which 1 fuppofe did produce Threads of 
an extraordinary bignefs, in comparifon of the refr. 
Now, if we take it for granted (as it is really true ) 
that a young Spider jafl: come out of 'the Egg is three 
hundred times fmaller than a full grown jSpider, and at 
the fame time allow that this young Spider has all thi - 
Working Inftruments within his Body as the old on?, 
A a a a a a (which 
