98 TRANSACTIONS OF THE 



E, the grain hopper (and may be removed at pleasure). 



H, the thumb screw, that adjusts the swing valve as it beats against a revolving 

 feeder, within hopper 0, thus regulating the feed to the stone. 



X Y Z, are tha journal bearings. 



K, the mill pulley, to revolve with the sun, or as indicated by the painted arrow. 

 It takes an attachment by belt from a horizontal drum, and should be distant from 

 it nine or ten feet ; or may be attached to a vertical drum by a belt to be half twist. 



L, the regulating screw, having counter sink that contains a thick leather 

 •washer at the end next to the stone spindle; this washer receives the end pressure 

 of the stone spindle, and when worn thin by use (say once in a month or two), 

 needs to be replaced by a thick and solid piece of leather. 



M, the jam nut or wheel, to steady regulating screw L. 



The inventors furnish the following particulars: 



Size No. 2 weighs only about 220 lbs., and is intended to meet the wants of the 

 farmer and planter; can be driven to good advantage by two horses. 



Size No. 3 weighs about 350 lbs., for grinding corn and feed, or wheat in a small 

 mill. 



3d. The peculiar shape of the grinding surfaces affords a nicer adjustment than 

 is possible on any other mill, consequently this mill will grind closer, and more 

 even, than any other. For this reason they will make a better yield from wheat, 

 and are far superior to any other for grinding paints and colors, also lamp-black 

 and varnLsh for printers' ink. 



4th. Their light weight and simplicity, render them eminently portable, so much 

 so that they have been used by an invading army, to convert the enemy's grain 

 into flour for their own use, the mill being taken with them each time they moved 

 their camp. 



Size No. 4, 450 lbs., as proved by experience, is the best size for flouring pur- 

 poses. With four horse power, and running 1,200 revolutions per minute, will 

 grind eight bushels of wheat per hour, and will grind cooler, leaving the flour con- 

 sequently livelier, and will make a larger j'ield than ordinary stones. 



There are numerous advantages resulting from the use of this mill : 



1st. The same amount of work can be performed with less than half the power 

 required by flat stones of any size. There are two principal reasons for this. The 

 grinding is done within six inches of the centre, and there is but a small quantity 

 between the surfaces at one time. 



2d. The quality of the flour is improved in many respects. Being ground cooler, 

 there is less loss by evaporation, the evaporation being not only a direct loss, but 

 is the direct cause of the perishable nature of most of the flour made on the old 

 principle; in confirmation of this theory, we would call attention to the fact, that 

 we have samples of flour made on this principle, three, five, seven, eight, nine, and 

 ten years of age. It is the unanimous opinion of all impartial persons who are 

 conversant with the subject, that these mills make clearer, livelier, and richer flour 

 than any mill on the old principle. 



