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Dunstan Times, Issue 3136, 25 September 1922, Page 2

It is by no moans nn easy matter for :in agricidturist to choose the host typo of tractor for liFc-; particular purpose. All the more important, therefore, is it that accurate details should be available of test performances of each model. Comparative trials involve tire use of an instrument for recording the exact pull which the tractor exorcises under different conditions. The first types of instruments employed for this purpose wore of rather a laboratory character, and a British engineer was therefore led to design an appliance which, while accurate, could readily withstand the rough conditions of tests in ploughing and other operations. The instrument lie lias designed lias proved entirely successful and has been adopted by Initish and other governments •for testing haulage appliances of various kinds. It can be arranged to give a record on a chart of the time occupied by any particular test, in addition to the draw-bar pull at any moment; and it will record also the depth of the furrow which is being ploughed.