124 TIIE YEAR-BOOK OF AGRICULTURE. 



ing mills at the Pennsylvania State Agricultural Fair for lSo">, is claimed to possess some 

 advantages over all other similar inventions both in respect to the small amount of power 

 required to operate it. and in the quality of the work performed. The striking peculiarity 

 about this mill is found in the fact that the centre or core is stationary, while the outer 

 casing revolves, the power being thus applied most advantageously at the point of greatest 

 resistance. A disadvantage is thus obviated which pertains to some other mills — namely, that 

 the weight of the driving arms applied to the movable centre bears unequally, causing it to 

 grind fine upon one side and coarse upon the other. 



The movable Basing of Granger's mill has an attachment of small rollers at its base, on the 

 outside, which renders the motion and consequent grinding action of the mill uniform, and 

 prevents the rotary casing from changing its position. The mill may be made to grind coarse 

 or fine, as may be desired, by elevating or lowering the outside casing by means of a screw. 

 This external casing revolves on a case-hardened pivot attached to the top of the stationary 

 core or centre — a point easily accessible for the purpose of oiling the bearings. The centre is 

 firmly supported upon three triangular legs. 



A great advantage claimed by the manufacturers of this mill, Messrs. Cresson, Stuart, and 

 Teterson, of Philadelphia, is, that in imparting the motion to the outer casing, instead of the 

 centre, the corn and cobs by the outer revolution are caused to descend and adhere to the 

 inside, while in the opposite case, the same materials, by the centrifugal force imparted from 

 the revolving centre, have a tendency to work upwards and away from the points where the 

 grinding action takes place. 



The construction of this mill will be easily understood by reference to the engraving, which 

 represents it as seen in section. 



Great Flouring Mills. 



Both in England and the United States, great exertions have been made in the last fifteen 

 years to improve flouring mills and make them produce the largest amount of flour in a given 

 time. At the Great London Exhibition, a conical mill was exhibited, which was afterwards 

 examined by a committee of Parliament and a number of scientific gentlemen, and pro- 

 nounced to be a wonder of its kind. Two of these conical mills were put up in an establish- 

 ment alongside of two old-fashioned flat mills, and the following is given in an English 

 paper as a result of the trials: 



There were three trials as regarded the old system and the new. The first experiment on 

 the old mill give a discharge of 1G pounds of flour in five minutes, which was equal to 102 

 pounds per hour; while upon the patent mill there was a discharge of 38$ pounds in five 



minutes, or 462 pounds per hour. The differei , therefore, on that experiment was against 



the old system 270 pounds per hour. The second experiment tried was even more favor- f 

 able BS regarded the new system. Two conical mills worked against two on the Hat princi- 

 ple for one hour, ascertained exactly, and with the following results: 



Conical mill (No. 1) produced <"} bushels. 



" (No. 2) " 72 ■ 



PlatmiU (No.l) " 3 



" " (No.2) " 3 " 



This was regarded as a wonderful achievement, and the scientific committee declared in 

 their report thai these conical mills must very soon supersede the old flal mills. 



Now we an- glad to have it in our power U say that mir scientific millers in Pennsylvania 



have 1 n Improving the Old flat burrs, so M to make them completely eolipee and throw in 



the shade these celebrated English conical mills. Messrs. tTUboo A MVulh.ugh have recently 



Dieted a low '•team mill in our bOTOUgh, in which they run U feet flal French buns two 



hundred revolutions a minute, that turn out flour faster than we ever Saw It run from a mill- 



■ atlemen calculate to grind regularly from six to seven barrel- of extra Hour 



per hour, ..li each run ofstones, and they may be able to do more. As high as thirty butJltU 



of wheal have 1 ground on OtU run of ttonr* in this mill in an hour! We a>-k if this has 



ever been beaten anywhere? — Harruburg Union. 



