294 



partly stripped the machine is much less coDcealed than it would be 

 had a field of larger cotton been selected. The ground plan of the 

 frame and system of pipes is diagramatically illustrated in Plate 

 XLIX in Fig. 1, while the same device as folded narrow to be hauled 

 through gat s, &c., is cut from a photograph as seen in Plate XL VIII. 

 By reference to the diagram the frame, a x I z, is seen to be A -shaped, 

 and is composed of two main bars, a, hinged together by a bolt, at o, 

 extended by two long arms, x I, spliced on, at x, while a cross-piece, zs(, 

 is bolted on as a set-bar upon which the side bars can be set at a wider 

 or lesser angle. Numerous holes for this purpose will be seen in the 

 cross-bar. This cross-piece is also cut and spliced at its middle so that 

 its one half can lap against the side of the other when the frame is 

 narrowed. Beneath the side bars, near their middle, legged wheels are 

 attached. 



These appear best in Plate XLYIII. The crank-axle of the wheel 

 has a round, upturned pivot inserted in the base of the vertical leg 

 which is tubular, being a piece of heavy gas-pipe with a solid T-plate 

 welded in the top and bolted to the frame. The crank-axle also has 

 attached to it by a band clamp a stout brace extending upward and 

 forward to the cross-bar. The pivot arrangement allows the wheel to 

 be set parallel to the rows after being thrown out of parallelism by set- 

 ting the side bars closer or farther from each other. The legs described 

 elsewhere, and shown in the machine figured in Plate L, are likewise 

 adjustable on a vertical pivot and answer the same purpose, while they 

 are simple, strong, and on some accounts preferable to those here used. 

 They may be employed on the A-frame instead of these. The frame is 

 thus supported at its sides near the middle, so nearly all of its weight 

 comes on the two wheels ; but its forward half is the heavier, and this 

 is sustained and the whole is drawn by the apex-attachment to the 

 hind end of the body of a wagon. This frame should be hinged fast, 

 preferably near one corner of the body and at a point over the center 

 of the row interspaces. This can be done in various ways, but a move- 

 ment up and down as well as laterally and some degree of rocking 

 should be allowed at this joint between the wagon and the frame. It 

 can be linked by a clevis or otherwise to the eye of the end-gate rod ; 

 but a stronger fastening consists of a thick block 4J by 4J inches a 

 little longer than the width of the box, but with its ends halved out to 

 allow it to drop snugly half way in and hang close against the end- 

 gate, against which it is pulled by the frame which has a pivot or bolt 

 inserted through its front end and through one end of the block. By 

 this arrangement the strain upon the end-gate is somewhat equalized, 

 and the whole is easily detached, for at this connection the wagon 

 should be conveniently separated whenever it is to be driven off for a 

 fresh supply of water. 



In Plate XLIX, Fig, 1, the system of pipe-branches appears separated 

 slightly from the side bars to which its main branches are normally at- 



