The author describes a number of detailed developments that took place during the working out of a line of worm-driven trucks.
The details of front axle and steering parts are dealt with at length, the reasons for the final constructions being clearly explained and the constructions themselves well illustrated.
Details concerning difficulty with the Hotchkiss type of drive on heavy trucks, troubles with drive-shafts and lubrication of the worm wheel are all covered thoroughly; spring-shackle construction and lubrication, radiator and hood mounting come in for detailed attention and the question of governors is interestingly covered.
Brief reference is made to the influence of unsprung weight, the differences between truck and pleasure car practice in this respect being pointed out.
