1805.} 
years, carried the finall one along with 
itfelf, in the pach it defcribes im {pace; 
both being equally affeéted by parailax and 
real motion. If this be admitted, a mu- 
tual revolution of the two ttass will be the 
immediate confequence, when the laws’ of 
gravitation are taken into confideration ; 
and the change of polition they have un- 
dergoneé, will be a neceflary confequence 
of it.”’ 
Dr. Russevr’s «© Remarks on the 
voluntary Expantion of the Skin of the 
Neck, in the Hooded Snake of the Eatt 
Indies,” and Mr. Homa’s ‘ Deferip- 
tion of the Strugttre of the Parts 
which perform that Office,’ will inrerelt 
the ftudents in natural hiftory. The 
object of the paper is to explain the me- 
Mew Patents lately Enrolled. $67 
chanifm upon which the hood, the pecu- 
liar characteriftic of this fpecies of {nake, 
depends, without entering into a difcuffion 
of the ules for which itis defigned; but it 
is obferved, that the expanfion of the ribs 
an{wers no good purpofe refpecting the 
lungs, fince they are not fo fituated, in this 
animal as to receive any advantage from 
it: but the gullet, where it pafles down 
along the neck admits of great expanfion, 
and the extended ftate of the ribs, at the 
time the animal is employed in catching its 
prey, may giveto the gullet a facility of 
being dilated, for the reception of the 
food. 
This defcription and remarks are ac- 
companied by plates, and explanations of 
the feveral figures. 
NEW PATENTS LATELY ENROLLED. 
— 
MR. ROBERT BROWN's (NOTTING- 
HAM), for a Machine to be affixed to 
horizontal Warp or Vandyke Kuitting- 
Frames, for manufacduring, by a more 
neat and expeditious Method, Lace or 
Nett-Work of various Figures, Qualt- 
t1é5,,G5 ¢. 
E mutt refer our readers to the 
fpecification tor an account of the 
firucture of this patent machine, which 
cannot be rendered intelligible without 
the aid of figures. Having defcribed the 
different parts of the machine, the paten- 
tee proceeds to explain the mode by which 
it is worked, which is as follows :—The 
warp is wound on two beams, with ar- 
bors or fpindles faftened in the ends ; 
which arbors are f{upported and turn on 
{crew-points, pafling through arms fixed 
on the fide pieces of wood-work, and en- 
fering the ends of the arbors. Two per- 
forated bobbins are put on the arbors at 
one of the ends, and are kept turning by 
{guare parts of the arbors entering into 
correfpondent fquares in the bobbins. — 
The ends of a line are fattened to bobbins, 
and a weight fufpended on the line to 
keep the threads tight between the beams 
and the needles ; as the beams turn 
round by the threads feeding the needles, 
the line winds round the bobbins, and 
draws up the weight, which is let down 
again by taking the bobbins off the 
fquares of the arbors. 
To make Bruffels-lace, the machine is 
fet toa two needle fhog, a term ufed for 
its fideway movement at the diliance of 
two needles, the fwing-bar is fo adjufted, 
that, when put in at either end, it ftops 
the fideway movement half the diftance it 
would otherwife move. The thumb. 
levers attached to the falling-bars are put 
under the lower {tops of the catches. . The 
threads on one beam are entered through 
the eyes of the guides on one falling-bar, 
and thofe on the other beam through the 
eyes of the guides on the other falling-bar, 
one thread from each beam enters be- 
tween every. pioneer. When the threads 
are much inclined to twift, there is, ex- 
chufive of the pioneers deferibed in the 
figures attached to the f{pecification, an- 
other row ot them ufed, which enters be- 
tween the threads at the bottom of the 
crank-har. This row of pioneers is made 
of ttraight wires faftened ina flip of wood, 
which is fupported by arms on the fide- 
pieces of the wood-work, or fixed to the 
crank-bar. The work is* fet on in the 
{ame manner as in the common horizontal 
warp-trame ; and when the proper num- 
ber of courfes are worked with the fwing- 
barin on the right-hand, the telegraph 1s 
inoved, which Jets down one of the falling- 
bars fo low, that the guides on it will not 
lay the threads over the needles; the 
{wing-bar is then pufhed in on the left- 
fide, and the machine held to the right, 
and the threads laid over half of the 
needles , which form loops on them ; the 
fwing-bar is then pufhed in on the right- 
fide, and the machine held to the left, 
and the threads are laid over the other half 
of the needles, forming loops likewife on 
them 
