Report of the Judges. 207 



the draft of each. They will then determine the best plow for lightness of draught, 

 which determination shall be recorded by the chairman. 



§ 14. The plows shall then be examined with regard to wear, those being deemed 

 best M'here the wear is most evenly distributed. The plows having the greatest 

 number of votes shall be deemed the best in point of durability. 



§ 15. The plows shall then be minutely examined with reference to the material 

 of which they are composed (the quality of the wood and iron), and the best in 

 this respect shall be recorded as "made of the best material." 



The plow having the greatest number of suffrages shall be deemed the best for 

 mechanical construction. " 



§ 16. Exhibitors will be required to present an ingot, cast in an iron mould, of 

 the iron used in making the plow, at least one and a half inches thick. There 

 must be an aflBdavit stating the furnace from which they obtain their pig-iron, and 

 if more than one kind is used, the proportions of each kind used, and that the 

 ingot is a fair sample of iron used in the plows. 



§ 17. The judges will closely observe the furrow slice in the act of being turned 

 and see if that action tends to open or compress it ; they will also observe the 

 force required to press the end of a stick into the furrow. If practicable the 

 jud-^es will not determine on the question of pulverization until they have had an 

 opportunity of seeing the time that elapses before each lot dries after a fall of 

 rain, and the growth of crops on each. 



§ 18. The plow which is finally determined to have the greatest number of good 

 points shall be awarded the first prize as the best plow. 



§ 19. The judges shall in no case consult with each other or express opinions 

 in presence of competitors. 



§ 20. No person except judges and officers shall be permitted by the police to 

 enter upon the plowed grounds. 



§21. The judges will cause comparative experiments to be made to ascertain 

 the influence of the coulter on draught ; they will investigate experimentally the 

 best angle for its insertion, and also the most advantageous depth for it. 



§ 22. They will inquire into the effect of the wheel on draught. 



§ 23. They will ascertain the influence of speed upon the draught of the plow. 



§ 24. They will ascertain the effect of long and short beams. 



§ 25. They will investigate the influence of weight on plows. 



§ 26. They will ascertain the rate which the several parts of the plow consume 

 power, as compared with the total draft, i. e. what proportion of the power is 

 consumed in turning the furrow over.'' What proportion for overcoming the cohe- 

 sion of the earth on the land side .'' On the bottom ? How much of friction 1 

 Miscellaneous Regulations. 



§ 1 . The plows for competition must be exactly as they are sold to the farmers, 

 except that each competitor will be allowed to scour the working parts. 



§ 2. Provision will be made by the Society for conveying the judges to and from 

 the trial grounds. Lunch will also be provided for them. 



§ 3. Notice will be given of the time and place of holding the trial as soon as it 

 is determined on. 



PROGRAMME FOR HARROWS. 



§ 1. There will be but one class of these machines. A premium of a medal 

 is offered for the best harrow. 



§ 2. The general rules for the trial of plows will be followed in the trial of 

 harrows, as far as they are applicable. 



