166 KiiFOBT OF TUE iJoTANlST OF THH 



sity of straddling the row led to the construction of a larger 

 truck with arched axles which would clear the asparagus without 

 injuring it. The sides of the arches were constructed of one and 

 one-half i-nch square iron, the latter being bent at top and bottom. 

 The top angles were flattened for attachment to an oak plate 

 which formed the top of the arch, while the bottom angles formed 

 the spindles for the wheels. The width ©"f space at base of these 

 archee is 4 feet 1^ inches, while at the top this space is 3 feet 

 6 inches. The slant height of front arch to arch-plate is 2 feet 

 5 inches; slant height of rear arch to arch-plate 1 foot 10^ inches. 

 Both arches were braced, each brace being 2 feet 6 inches long, 

 made from inch iron. The arch-plate clears a space of 4 feet. The 

 arrangement and sizes of parts of front truck are shown in Fig. 1, 

 Plate XVJI. As it would have been bad mechanics to draw all 

 the load from one point at top of the front arch, especially with 

 wheels which had a tread of 6 feet, a double-tree was attached to 

 the pole and then connected with the axle of each fore-wheel so 

 that enough of the load was drawn from the latter points to 

 remove all side wrench on the arch. (See Plate XX.) The arch- 

 plate of rear arch forms part of the whole framework and is 

 shown in Plate XVI. The tool box is shown only in photographs. 



With the exception of the brake-bar, the 2x4 inch cross plate 

 at rear of frame, and the 2x3 inch diagonal plates which support 

 th-e carrier, all the wood parts are of oak. The brake-bar, the 

 diagonal carrier-supports, and the cross plates on which the 

 latter rest, are of pine. A clear space of 2 feet 11 inches was 

 allowed between the side plates. At points Hi, Plate XVI, three 

 half-inch iron plates are attached for carrying the upper half of 

 the fifth-wheel and serve as partial supports for the tank. 

 Across the rear end an oak plank 14 inches wide was bolted to 

 side-plates as a support for the pump. In addition a second 

 plank shown in Plate XVI was bolted to the above cross plank 

 and to rear arch-plate for attachment of fulcrum to clutch-brake. 

 The lengths and sizes of timbers are as shown in Plate XVI. 



The wheels are iron, having 4-inch tires one-half inch thick, and 

 guaranteed to carry from 8,000 to 12,000 lbs. The rear wheels 



