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APPLICATION OF THE MACHINES. [Chap. 10.

in the place of the hags, for the meal to fall in, out ofwhich it may be taken and put into the bags, as fast as itis bolted, and mixed as desired; and as soon as the firstparcel is bolted, the little gates at the mouth of the bagsmay be shut, while the meal is filled out of the box, andthe second grist may be bolting.

The advantages of this improvement on a grist millare,

1. It saves the labour of hoisting, spreading, and cool-ing the meal, and of carrying up the bran to be groundover, sweeping the chest, and filling up the bags.

2. It does all with great despatch, and little waste,without having to stop the stones or bolting-reel, to keepthe grists separate, and the bolting is finished almost assoon as the grinding; therefore, the owner will be theless time detained.

The chests and spouts should be made steep, to pre-vent the meal from lodging in them; so that the miller,by striking the bottom of the chest, will shake out allthe meal.

The elevator and drill should be so made as to cleanout at one revolution. The drill might have a brush ortwo, instead of rakes, which would sweep the case cleanat a revolution; and the shoe of the bolting hoppershould be short and steep, so that it will clean out ra-pidly.

The same machinery may be used for merchant-work,by having a crane-spout at C, or a small gate, to turn themeal into the hopper-boy that tends the merchant bolt.

A mill, thus constructed, might grind grists in theday-time, and merchant-work at night.

A drill is preferable to a conveyer for grist mills, be-cause it may be cleaned out much sooner and better. Thelower pulley of the elevator is twice as large in diameteras the pulleys of the drill; the lower pulley of the ele-vator, and one pulley of the drill, are on the same shaft,close together; the elevator moves the drill, and the pul-ley of the drill being smallest, gives room for the mealto fall into the buckets of the elevator.