f ) 
With great reafon one may fijfpecS: that ft is refufe 
Silk , and cannot be equally drawn out and fpuri, for 
one Thread will be Ihorrer than the other, which is 
Labour and Loft. It will be aifo requifite to (earch the 
Bale more than once, and take from out of the Par- 
cels a Skean to make an Eflay ; for unleft one buys that 
which one knows by tryal, there is a hazard of being 
Cheated , and fo, for one fort, have another. 
T<f mah$ an E^hmte of Stlh^ by Ejfdy^ and la 
h^ww its htghtnefs. 
Fix che EiTay upon one eighth of a Fortee hand ijf 
SJk, of iio AanesoF Lyons in length, and whac 
it makes of Aunes by the Eighth part ^ the Skean 
W'hich is of 80 Threads,mult be multiplied by no Aunes 
of Lyons ^ which is the lengch of no Aunes, from 
which Number muft be dedudted one eighth; as for 
Example, i lo by 80 m.ikes 8800, the eighth part o'f 
which is 1 1 00, which is the eight part ot ^ Ponee i 
Now to calculate what thefe noo A.imes weigh, which 
is the eighth part cf a Fortee^ or of 1 10 Aunes of Lyons, 
It will be proper to take a Skean out cf the Parcels 
which you take from out of the Bale, which you judge 
may contain at kaft lioo Aunes ^ to make the one 
eighth part of a Forth, which Portie muft be divided 
on two Bobbins, half on each , then fix the two Bob- 
bins on the Cantrs ( Beam, and from thence pafs it 
through the (Comhe^ hourdiffoir^ viz. 550 from the 
Two Bobbins will make 1 100, which will be one eighth 
part of what you defire to know ^ this done, you cut 
off your Siik, and carry it to be put on the HourdijjGiri 
Then weigh it , and Multiply the weight by eight, 
D d it 
