Royal Society. 363 
I fteans be even and all equal, which fhews they were wrought 
f together 5 otherwife they cannot be equally drawn out andfpunj 
t it is requifite to take a lltean out of the parcels to make an 
1] cflay. 
f/ To eftimate the filk by ciTay, fix the eflay upon the eighth 
of a ^ortee-hando^ filk of no ells of Lyons in length, and fee 
what it makes of ells by the eighth part 5 the lltean of 80 threads 
muft be multiplied by no, the length of the ells, from which 
produ6l muft be deduced one eighth, which is the eighth part 
of 2. Nortec j this Tortee muft be equally divided on two 
bobbins, then fixing the two bobbins on the beam, and from 
thence pafling it thro' the hourdiffoir, cut off the filk and 
weigh it, and multiplying the weight by 8, it will weigh juft 
as much as a Tortee of no ells of Lyons, which is the general 
rule of calculating, when they draw the filk out ; the ^Porree 
of lighteft filk in ^Tiedmont weighs near 24 pennyweight to 25 
and 2(J, others 27 and 28, which weight may be diipenfcd with, 
provided the other qualities be as good, viz. well- wrought, 
even, fine and clean. 
ji Difeafe caufed by fwallowing Stones 5 by Sir Charles Holt j 
ivith Remarks thereon by 'Dr. Sloanc. Phil. Tranf. N ° 2 5 3. 
p. ipo. 
O^^^/homasGohfill, a lean man aged about 25 or 27 year?, 
being for 3 years extremely tortured with wind, was ad- 
vifed to fwallow round, white pebbles, which he did as often as 
the fit returned, and the ftones paffin.g eafily through him, he 
thereby found great relief; but fomernonths after being liezed 
with a violent fit, he fwallowed as ufually about 9 ftones, which 
notpafiing, he repeated the dofe, till he had taken above 200 5 
thefe ftones were lodged in his body above two years .md a half, 
when he firft came to Sir Charles, and then he complained that 
his appetite was gone, that he could digeft nothing, but threw 
up every thing he eat; upon examining his belly. Sir Charles 
found the ftones lay alnioft aslow as the Os pubis, and thrufting 
his fingers juft above that bone, fo that the lower part of the 
j4bdomenmi^M lie on hishand, he could with the motion there- 
of /liake and make them rattle, as if they had been in a bag ; 
hereupon he caufed a ladder to be fct againft a wall and hung 
him up by the hams, with his head downwards; when he was 
in this pofture he lold Sir Charles the ftones were got up to his 
ftomach5 but being fet down upon his feet, in a very little 
