called a Gypsey, for Spinning Hemp and Flac. 3682 
tension, which may be regulated by weights placed upon the 
frame in which the pulley revolves, which frame, as will be seen 
in the figures, is hung by gudgeons that move in the frame 6e 
6e, &c. 
From what has now been specified, it will be seen that motion 
being given, as heretofore described, to the drawing-frame, such 
motion must be communicated from the pulley 7d, on that frame, 
by the belt, to the pulley 8e on the bobbin-frame, and from 
thence, by the bevel-wheels 9e and 1g to the drum 9f. It must, 
moreover, be evident that the pulleys 6fand 7/ will, at the same 
time, be made to revolve, as they are connected by belts with 
the drum 9f. The filament, therefore, as delivered from the 
drawing-rollers, being passed through the hollow gudgeon on the 
left end of the flyer, fig. 14, and over the pulleys 2/2f to the 
bobbin, to which its end is fastened, must, by the revolutions of 
the flyer and bobbin, be twisted. In order, however, that it may 
be wound up on the bobbin, it is necessary that the bobbin and 
flyer should not make an equal number of revolutions in the same 
time. Now it will be seen that the end of the drum 9/, from 
which the belt passes to the pulley 7f, is larger than the other 
part of the same drum, while the pulleys 6f and 7f are nearly 
equal in size. Hence the flyer will make a greater number of 
revolutions in a given time, than the bobbin. -The tendency 
therefore will be, to wind up the yarn upon the bobbin with a 
rapidity proportional to the difference between the speed of the 
bobbin and that of the flyer; that is, whenever the flyer shall have 
passed through one revolution more than the bobbin, then one 
turn of yarn must be wound up on the bobbin. But the bobbin 
increases in size as the yarn is wound upon it, and, consequently, 
the turns of yarn, as the circumference of the bobbin increases, 
become longer. It is necessary, therefore, that, as the bobbin fills, 
87 a 
