On the Treatment of the Silk-Worm, 99 



D D. Two steps for the first operator. 



E. The rope by which the wheel is turned, which is 

 kept in motion by the first operator with one foot. 



F. Five hooks, projecting over the boiler. ThesQ 

 ai*e shaped like one turn of a common cork-screw, the 

 point up, but, of course, not sharp, to avoid hurting the 

 hand of the person who catches the silk into the hook. 



G. Five small wheels of lignum vitae, which turn 

 with the action of the large wheel in drawing the silk. 



H. Five circles of iron, to receive the threads of silk, 

 before they are finally wound on the wheel. These cir- 

 cles are shaped nearly as at a, and fixed in a piece of 

 wood, which is horizontally moved backwards and for- 

 wards, by a small wheel, marked I, which is turned by a 

 small cord, K, passed round the axle of the large wheel. 



L. The threads of silk catched into the hooks F, 

 then passed over the wheels G, and doubled in towards 

 the boiler, so as to form a cross of the threads, before 

 they are hooked into the circles H ; and so on round 

 the wheel, winding on the bottom of the wheel first. 



M. The wheel. 



N. The fire-place. 



O. The chimney. 



