Ix Prizes for Implements and Machinery. 



* 

 detail, and the means provided for easy access to the working parts, and to 

 economy of fuel. 



(3). Fixed Steam-boilers. — " Special Peize." 

 The holler must possess an effective heating surface of 25 superficial feet and 

 three-fourths of one foot superficial of effective fire-grate surface for each 

 nominal horse-power. Clear and concise drawings and specifications, with the 

 cost of forming the boiler-setting, with its flues and passages up to the entrance 

 into a chimney, must be furnished to the Society, for pubUcation, should the 

 Council think fit to publish them. 



If tubes are used, none less than 3 inches diameter and 1 inch apart will be 

 allowed ; and no tube-plates shall be used which are not made either of " Low 

 Moor" or " Bowling" iron, and bearing the ironmaster's trading mark. The 

 fittings which the exhibitor supplies must be shown with the boiler, and a 

 guarantee given that he will supply the public with boilers and fittings of a 

 similar description, at the price named, for twelve months certain after the 

 prize has been awarded to the exhibitor. 



(4). Chaff-cutters and Mills. 



Chaff-cutters will be required to cut chaff three-eighths of one inch in length, 

 in the trial. The exhibitor may provide means for cutting various lengths, to 

 show the usefulness of liis production. The Judges will be instructed to use 

 thin slips of v/ood for determining the length of chaff cut ; and if the deviation 

 from the givwi length of three-eighths of an inch is, in their judgment, too 

 much departed from, they may refrain from taking any notice of the machine 

 in question ; and in estimating the tueigJd of chaff cut, allowance must be 

 made and taken according to the length of chaff' cut. 



Grinding mills will be fairly set to work, and their production compared with 

 a sample which the Judges shall cause to be produced by one mill, and which 

 produce shall, in their estimation, be adapted for the farmers' purposes of feed- 

 ing. The mill under trial shall be " set" until it produces like meal ; and the 

 ti7ne, poiver, and quant Uy of worlc noted. 



Steel mills ibr grinding will not be expected to produce softened meal, 

 although any mill or combination, with rollers or otherwise, which will do so, 

 will receive consideration from the Judges ; but mills of this class generally 

 will be tried and compared in the class as grinding mills with stones are com- 

 pared in their class. 



(5). Speed and Pressure. 



All implements turned by the winch or hand-crank shall not be worked, at 

 any trial, l>eyond the following speed — namely, 42 revolutions per minute for 

 12-inch crank, 37 revolutions for 14-inch crank, 32 revolutions for 16-inch 

 crank ; and, in addition to the winch-handle which must be supplied with the 

 machine, for the purpose of trial, a pulley not less than 4 inches wide, of the 

 same radius as the winch, must be fitted to each machine. The machine, in its 

 trial, will be driven by the pulley of the testing machine, which pulley is 

 31 inches diameter, and will make 32^ revolutions per minute. 



Chaff-cutting and other small machines, worked usually by horses and by 

 steam power, will be worked, when under trial, by pulleys not less than 5-J- inches 

 wide, moving with a velocity of, or about, 900 feet per minute. 



Exhibitors are requested to pay particular attention to the instructions given 

 for the speed and workmg of their machines, as the Judges may refuse to try any 

 machine not fitted in accordance with the instructions. 



The working pressure of steam to be 45 lbs. per square inch, which must 

 not be exceeded. 



