THE YOUNG MILL-WRIGHT and MILLER'S GUIDE, by Oliver Evans
1- A hollow cast-iron shaft, circular, 15 inches in diameter except at those points where the water and main bevel wheels are hung, where it is increased to 19 inches in diameter. The water-wheel is secured on this shaft by 3 sockets, as represented in Plate XXVIII., fig. 3, and makes 10 revolutions per minute. 2-The main driving bevel-wheel, on the water-wheel shaft, 8 feet in diameter, to the pitch line; 100 cogs, 3 inches pitch, and 8 inches on the face, revolving 10 times per minute, and driving 3-A bevel-wheel on the upright, 4 feet in diameter to pitch line; 50 cogs, same pitch and face of cogs as above, revolving 20 times per minute. 4-The large pit spur-wheel, making 20 revolutions per minute, 9 feet 1/5 inch diameter, to pitch line; 114 cogs, 3 inches pitch, face 10 inches; this wheel gives motion to 5,5,5,5-Four pinions on the spindles of the mill-stones, 18,1 inches in diameter to pitch line, 19 cogs same face and pitch. 6,6,6,6-Iron uprigh-shafts, extending the height of the building, and coupled at each story. 7,7,7,7-Are 4 pairs of five feet mill-stones, making 120 revolutions per minute. Two of them shown in elevation; and the position of the 4 shown in Plate XXVIII, as represented by the dotted lines fig. 1. 8-A pulley on the upright shaft, which, by a band (leather belt), gives motion to 8-The fan for cleaning grain, revolving 140 times per minute, wings 3 feet long, 20 inches in width. 9-A bevel wheel 2 feet diameter, cogs 2 inches pitch, face 2,5 inches, on the upright shaft, gearing into a bevel wheel, the face of which is shown, drives the bolting screen 18 revolutions per minute. 10-A bevel wheel on upright shaft, 56 cogs, 2 inches pitch, 2,5 inches face, gearing into 10-A bevel wheel on the shaft of the bolting reels, 31 cogs, same pitch and face. 10, 10- Are two of four bolting reels shown, 18 feet long, 30 inches diameter, revolving 36 times per minute. 11-A large pulley on the upright shaft, which by a band (leather belt), gives motion to the rubbing stones 11. 12-A bevel wheel, on the top of the upright shaft, gearing into 12-A bevel wheel, on the horizontal shaft, at one end of which is 13-A bevel wheel, 1 foot diameter, gearing into a bevel wheel 14-of 5 feet diameter, which reduces the motion of the hopper-boy down to 4 revolvutions per minute, which sweeps a circle 20 feet. 15-Meal elevator attending 4 pairs of stones. 16-Grain elevator. 17-Packing-room and press. NOTE: Plates XXVII & XXVIII, were reprinted in Volume 2, pages 234-236, of "The Operative Mechanic, and British Machinest: being A Practical Display of The Manufactories and Mechanical Arts of the United Kingdon," by John Nicholson, Esq., Civil Engineer, 2nd American edition (3rd London, edition with additions) Philadelphia, T. Desilver, Jun. 247 Market Street, James Kay, Jun. & Co. Printers, 1831.
