( f ooS) 
»ifo faftocd underneath a Cord, which paffcs through the Pulr 
ley f, and which carries the weights V. 
At the fame end of the Arm is added a lixcle- Niche Z, a- 
botit thebignersof half the Shuttle : tbenovera little Barr 
XT, which palTes athwart the Arm,thcre aretwaothef little 
peices of Wood having at the end of them two teeth, whrcb 
enter into the Niche Z through two holes which aire ihere of 
the one fide and t'other. 
Totheendsof thefe little peices of Wood there is ^ 
little bow of whale-bone or Steel, which keeps the two ends 
afijnder, and forces the teeth , which areac the other end,ro« 
enter into the iV/VA^, before the faid peices can themfelves* 
At the Points i !• are two Ropes , that pa^fs through the pul- 
lies 2 2. faftned to the Pillars o» 3. a. 4. and have each of 
them a little weight at the* end big enough to keep it from 
pafling through a little Ecrvl which is under each Pulley. 
This Arm thus difpofed goes and comes in thehole NN 
m the following manner* One Tooth of the Serpent already 
defcribed, ftrikes upon the Extremity of the £4/^«/^ P 
and fo cs^^jfes the end ^to rife up, which drawing the Cord 
faftned to the Point RM. makes the Arm L M 10 advance 
forward^ But when afterwards the tooth of the Serpent 
come foi tb again , then the Weight T ty'd to the other end 
of the fame Arm by a Cord^ that pafles through the PoIIey 
T, forces the faid Arm by its own Weight to return again* 
When the Arm LM is in its ordinary place, the z little 
pieces of Wood , into which enters the Bar 7] enclofe the 
Shuttle by means of the Whale bone Spring* But when the; 
ftid Arm approaches the other oppofite Arm,thcn thecordy 
iy*d toxhe point m> being a little too fhortiand the Weight 
which isat the endof themnotbeingableto pafs through > 
the Spring gives way a little, and fo the Shuttle is no longer 
enclofed by the Arm which carries it , but is wholly recei- 
ved and grafped by the other ; which likewife in its turadct 
livers it back again , in the fame manner. 
The Motion of t te whole Machine is made at the rate 
asyoumove the handle of the Serpent, for then the Arms> 
caufe the threads to open, and immediately one of the Arms 
begins to Aide in towards the oppofite Arm, to which it 
carries 
