C^7^ ) 
(which as (he grows in bignefs are aHo enlarged in pro- 
portion^ we muft neceffarily conclude that the Threads 
that are fpun by the young, are three hundred times 
fmaller than thofe fpun by the old Spider, which finenefs 
and fmalnefs is hardly to be ccnceiv^d by us* 
I always obferved, that when the ^^pidcr does nctfaft- 
en his Ttuead at one ftretch, the T.iieads arexdravvn in- 
wards with Bents and Krinkles, wheieupon I concluded 
that each of thofe thin Threads vva;3 in it felt round, 
but by the addition of feveral other Threads it acquired 
a FlateefSj as feveral common Threads laid together ap*' 
pear to us* 
The fame thing is alfo obferv^ by our Gold Wire- 
drawers, whofe Threads ( if they break or hang loofe ) 
krinkle, and then always appear round. 
I could net forbear defcribing ( as far as the Limner 
was able) the above- mentioned Inftruments, from whence 
lliofe wonderfully fmall Threads proceed. 
Fig. 5. R. S T V (hews one of the four outermoft In- 
ftruments, which Inftrument, with all its Quills or Reeds 
together, is not fo large as one common Sand 5 front 
whence you may imagine how fmall thofe Inftruments 
muft be, and how fine theThreads that are iricafed with- 
in the firft Inftruments. _ 
In the faid Figure at W the Working Inftruments ftood. 
as thick by one another as they do between R and S, 
but becaufe it is oppofite to the fight, and confequently 
was not eafily.to be diftinguiftit, I ordered the Limner to 
leave that place empty. 
Moreover, that part which was from the fight was not 
cover d with thofe fort of Quills, but with Hairs only. 
I made the Limner turn this Inftrument about, to have 
his opinion how many Quills or Reeds he thought there 
might be, upon which he told me that the number was. 
above pne. hundred.. * " 
I laid 
