146 Transactions of the 



The durability of the "World " can only he determined by a compari- 

 son of it with the machinery built in the same manner to be used for 

 other purposes. The engine lathe, which is in no point superior to it 

 (the same material and mechanism being common to both), after con- 

 stant use during an average of ten (10) hours each working day for 

 twenty (20) years, and shows little, if any, indication of wear. There 

 can be no reason why the " World " should not last and do its work an 

 equal length of time, and the proof of this is apparent in every machine 

 yet built, the testimony of those who have used it since its introducion 

 being to the effect that " there is not the least evidence of wear in any 

 part of the gearing." The same causes which insure its durability 

 equally establish its freedom from liability to derangement. The impor- 

 tance of this to the farmer, who with a full force of hands -employed at 

 high wages, is depending upon his machine for the prompt dispatch of 

 the harvest work and the security of his crops, is too manifest to be 

 discussed. Of the "World," one who has thoroughly tried it says: "It 

 worked like a charm, and there was no hindrance in the way of tinker- 

 ing, not even for a moment." 



The mowing bar of the "World" is made of cold rolled iron of the 

 best quality, it having been clearly demonstrated that it best answers 

 the purpose. The knife is greatly strengthened and improved. The 

 heel (made of steel and planed down so as to secure easy movement), 

 extends with a gradual taper out upon the knife, thus insuring perfect 

 safety to both, whatever may be the shocks or resistance the latter may 

 meet. 



The guards are of iron of the best brands, forged by regular "guard 

 makers," instead of being cast or malleable, as is commonly the case 

 with many other machines. The inside is lined with cast steel, then 

 ground so that a sharp edge is presented on both sides, and the keen 

 and highly tempered knife vibrating rapidly through them, the grass, 

 however tangled, wet, heavy, or dry, is mown so easily and smoothly 

 that, as an enthusiastic admirer says: "It is solid pleasure to see it 

 work." The guards are highly polished, so that they offer nothing to 

 which wet grass can cling. 



The rolling motion of the bar enables it to follow and adapt itself to 

 the undulations of the surface over which it is cutting, thus making a 

 stubble of uniform length and clean work anywhere. This is further 

 facilitated by the drag bar, which, like the runner of the "Yankee 

 Jumper," carries the bar and knife down into and over ditches and dead 

 furrows, and insures its safe passage over obstacles of every kind with- 

 out jar or danger of breakage. 



The parallel movement, an arrangement peculiar to the " World," hy 

 which the knife and pitman are kept perfectly in line (no matter how 

 low the bar may sink or how high it may be lifted), thus preventing any 

 binding or strain upon either, is a point of acknowledged and superior 

 merit. 



The ball and socket pitman joint provides for every twist and strain 

 to which the pitman is liable, thus securing an uncramped movement 

 while allowing the bar perfect freedom to adapt itself to the surface, 

 however rough or rolling may be the ground. 



The lifting arrangement is a simple lever and chain, so adjusted that 

 the cutter bar can be raised to and by means of a pawl and ratchet, con- 

 veniently located and under easy control, kept at any hight desired to 

 clear stumps or other formidable obstacles. The purchase is such that 

 very slight effort is used to handle it. 



