Grman Lorry Tractor Design.

L AST WEEK we described at some length the vary interesting collection of captured German Army tractors which the Army Council has collected together at Aldershot. Seldom has a......

The Goodhart Differential.

A Device which Combines the Advantages of the Ordinary Differential and the Solid Axle. A DIFFERENTLAL of considerable interest . has been -produced by Mr. Gavin C. Goodhart,......