. Bulletin - United States National Museum. Science. Figure 43.—Sloping wire draw-bench similar to the one described by Sellers. The tail of the lever (b) was actuated by studs or cams on a water wheel shaft. From John Nicholson, The Operative Mechanic, and British Machinist, 2d American ed. from 3d London ed., 2 vols. (Philadelphia, 1831). vol. 1, opposite p. 354. depressing the handle in the left hand, it was clipped of]'. As late as the year 1832, I found the pin straighteners still in use in England. One extensive wire worker was using the adjustable arrangement I have de- scribed. He call
. Bulletin - United States National Museum. Science. Figure 43.—Sloping wire draw-bench similar to the one described by Sellers. The tail of the lever (b) was actuated by studs or cams on a water wheel shaft. From John Nicholson, The Operative Mechanic, and British Machinist, 2d American ed. from 3d London ed., 2 vols. (Philadelphia, 1831). vol. 1, opposite p. 354. depressing the handle in the left hand, it was clipped of]'. As late as the year 1832, I found the pin straighteners still in use in England. One extensive wire worker was using the adjustable arrangement I have de- scribed. He called it the Sellers straightener, which he explained by saying that his predecessor had been a correspondent of Nathan Sellers, from whom he had received the plan, and at the same time the plan of his annular annealing pots, which they had not suc- ceeded in using for the finest numbers of brass wire, which I found them still annealing over open charcoal fires, requiring great skill on the part of the workman, and even then the work was very imperfectly done. On examining their furnace, the cause of failure was evident; a uniform heat could not be had in it, nor could the degree of heat be regulated with any certainty. I made them drawings of grandfather's furnace that had been without any change in plan successfully used for over fifty years, had one erected, charged a pot, worked off a heat, to the amazement of the proprietor, who was not slow in seeing certainty where there was uncertainty and a saving of not less than ten per cent in labor in that particular branch of his business. [33] From all I can learn the early memorandums of drawing brass wire relate to a sizing of the wire, and not making it from the crucible or ingot. All imported wire of that period, when in long lengths, showed a perceptible difference in size, one end fre- quently being a full number larger than the other. This was supposed to be owing to the wear of the holes in the draw-plates, and not as it p
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