[^ 170 ^ lob 



and passing through the centre of the pmion. This pinion has 35 

 feet. On the top of the pinion H, is a crank, having a sweep of 4 

 inches, and receives, on its top, the end of the iron wire-carrier of the 

 iTa versing bar I. The crank is fixed half an inch from the commence- 

 ment of the grooves of the pinion. This crank is shown in the figure 

 H. I, a traversing bar, 2 feet 10 inches long, i of an inch wide, i 

 of an inch thick, playing through the posts B K: height of the post, 

 from the frame, 17 inches. 



L. An iron carrier of wire, No. 1, 18 inches long, fixed to tlie bar 

 I, to work free by a screw. The other end is fixed by a burr, to the 

 pin passing through the centre of the pinion H. 



M M. Two wire hooks or eyes, (rampins,) 7 inches and i apart, 

 at equal distances from the ends of the traversing bar, through which 

 they pass. The wires to the commencement of the turns of the hooks, 

 are 5 inches in length. 



N. The reel; arms, 2 feet 2 inches and -j\ long in the clear; 1^ inches 

 wide, and -f^ of an inch thick: rails 20 inches ^ long, 2 inches broad, 

 -f^ of an inch thick; two of the arms are jointed, to allow the skeins of 

 silk to be taken off, when reeled and quite dry. There ought to be an 

 extra reel to put in the place of the one taken off, to prevent the work 

 stopping. 



0. Upright support for the axle of the reel, on the ends of which 

 the pinion is fixed, to work with the wheel G, at the end of the shaft 

 E. The pinion of the axle has 22 teeth. P. An iron plate with four 

 holes, 12 inches long, slightly hollowed, projecting 3^ inches from the 

 bar: the outside holes are 3 inches from the ends; from the centre of 

 one hole to that of the next, I of an inch. Distance from the two in- 

 side and nearest holes, 4 inches and -2-. 



Q. The copper basin to contain hot water, in which the cocoons are 

 immersed, when reeling off. It is IS inches long, 1 foot broad, and 

 4i inches deep. 



R. The furnace to contain charcoal, to keep the water hot. 



Distance from the centre of the posts A B, and K, 36 inches and 

 a half. Circumference of the reel (> feet 11 inches. 



Distance from the top of one arm, where it enters the rail, to another 

 arm, I85 inches. 



From the axle of the reel and the traversing bar I, four feet eight 

 inches. 



Figure 2 shows the arrangement of the frames for rearing the silk 

 worms, in Dandolo's laboratory. 



Figure 3. A semicircular chopper with two blades. 



Figure 4. Pierced box to place the moths in. See p. 109, 110. 



Figure 5. Frame or tressel to be covered with a cloth, on which the 

 moths are to lay their eggs. 



Figure 6. Rope frame to place the cloths on, containing the eggs to 

 preserve them until the spring. 



Figure 7. Hook to remove the silkworms, when necessary. 



