24 J in. Two handles are put on, plough-handle fashion, and attached 

 to the wheel 

 by a pin at 

 the centre. It 

 can then be 

 wheeled in any 

 direction, and 

 the revolu- 

 tions counted 

 for the rods 

 passed over. A 

 plainly visible 



easily made than a circular wheel, on which it is quite difficult for 

 the ordinary worker to strike such a circle the circumference of 

 which will be exactly one rod. This frame is also made and put 

 together more readily than a circular wheel. 



In the accompanying illustrations two sets of whipple trees are 

 shown, one for two horses yoked abreast, made of all iron, and cost- 

 ing about i 55. the set ; the other, a home-made set for three 

 horses. There is no reason why these essentials should not be made 

 from any round hardwood, and be equally, as good and serviceable as 

 the more expensive iron ones. 



mark is put on 

 one segment, 

 in order that 

 the revolu- 

 tions may be 

 more easily 

 counted as this 

 mark passes 

 the handles. 

 Such a mea- 

 surer is more 



A blacksmith will make the eyelets for six or seven shillings, 

 and the rest can be done with the saw and brace and bit. The 

 arrangement of the bars for three horses, as illustrated, compels 

 each horse to do his full share of the work, or show at once that he 

 is shirking. 



The point of attachment to the plough or load must be made 

 exactly one-third of the distance from the point of attachment of 



the double and 

 single whipple 

 trees, to give 

 each horse an 

 equal share of 

 the work. To 

 make a four- 



horse set, at- 

 tach a double 

 whipple tree 

 to the 

 where 

 single 

 (seen in 



point 

 the 

 one 

 the 



sketch) is attached, and make the attachment for the load exactly 

 in the middle of the rear bar. 



