376 
Five Years Progress of Steam Cultivation. 
Savory's Eugiiie. 
tlie steerage wheels ; and the long crank-shaft passing inside the 
drum drives it by pinions and internal gear, and also by means 
of a screw or worm gives motion (at pleasure) to the hind car- 
riage-wheel axle. The drum will contain 500 yards' length of 
rope in a single layer of coils ; and a couple of guide-rollers 
traversing the length of the drum by means of a rotating shaft, 
threaded like a screw, regulate the coiling so perfectly that the 
rope never overlaps itself; thus avoiding any grinding or damage 
from acute bending. Two engines thus fitted haul the imple- 
ment (a Fowler's plough or Howard's grubber, &c.) to and fro 
from one headland to the other: the guide-rollers deflecting the 
rope when the furrow is not quite at right angles to the direction 
of the headland ; while, in case of an acute angle of direction, 
the engine can be moved forward and steered so as to present its 
broadside always toward the line of work. This setting of the 
engine askew may not be very advantageous to a moist headland ; 
but there is plenty of time for the operation ; one engine having 
nothing to do but to take up its position while the other is haul- 
ing the implement. To feed the boiler with water while the 
engine is at rest, Messrs. Savory employ a small " donkey- 
engine," placed (like the steering mechanism and reversing 
