758 Jvurnal of Ayrualturv. Victoria. [15 Dec, 1919. 



11. W. J. Gaston's Scarifier. This luacliine, which can be drawn 

 by six horses, did excellent work on the furrow, is particularly suited 

 for loamy soils tlisit liiive become weedy after ploughing'. 



Tractor Demonstrations. 



The interest displayed by the visitors in the farm tractors shows their 

 growing- popularity, and the fact that there are no authoritative 

 figures of the cost of working the various kinds of machines is a disap- 

 pointment to many farmers and others. 



The tractors were stai'ted with their complement of plough at 1.20 

 p.m. on each day of the trials. The area of land allotted to each was 

 •3 acres, with the exception of Jelbart's No. 18, which was allotted 

 fi acres. The area selected was generally fairly uniform and flat, the 

 soil a clay loam, which was firm and lieavy for the ploughs. The 

 depth of ploughing was fixed at 4 inches. One steward was elected to 

 attend every tractor in the field, and six Werribee farmers acted as 

 moving stewards to advise and help when necessary. 



The following tractors ploughed on both days of the trials : — 



No. 1. Jelbart's No. 18 Tractor. E.H.P., 4.5. Revolutions per 

 minute, 400. Working speed. If miles per hour. This tractor pulled 

 21 furrows each 7 inches wide to a depth of 4 inches. Ploughs manu- 

 factured by T. Robinson and Company, Footscray. This tractor, which 

 seemed to be the most powerful on the ground, burnt crude oil after 

 the first ten minutes on benzine and kero.-eue. 



No. 2. A. H. McDonald and Company. E.A.A. Imperial Oil Trac- 

 tor. B.H.P., 45. Revolutions per minute, 500. "Working speed, 2\ 

 miles per hour. This tractor drew one 6-furrow McKay disc plough 

 and one 4-furrow Mitchell disc plough each day of the trial, cutting 

 7-inch furrows to a depth of 4 inches. The fuel used was low-grade- 

 kerosene with benzine to start. 



No. 3. A. H. McDonald and Company. E.A.E. Imperial Oil 

 Tractor. B.H.P., 45. Revolutions per minute, 500. Working- 

 speed, lA miles per hour. This machine drew three 6-furrow McKay 

 disc ploughs, each cutting 7-inch furrows to a depth of 4 inches. The 

 fuel used M^as the same as their E.A.A. Imperial Oil Tractor. 



No. 4. A. H. McDonald and Company's S.D. Light Weight Imperial 

 Oil Tractor. E.H.P., 22-o. Revolutions per minute, 500. Working 

 speed, 2^ miles per hour. This tractor, which was in operation on 

 the first day of the trial only, pulled a 4-furrow disc Mitchell plough, 

 each furrow cutting 7 inches to a depth of 4 inches. The fuel used was 

 low-grade kerosene with benzine to start. 



No. 5. The luternational Harvester Cqmpany's Titan Tractor. 

 E.H.P., 20. Drawbar, 10. Revolutions per minute, 500. Working 

 speed, 21 miles ])er hour. Pulled 4-furrow mould board tractor plough 

 to a depth of 4 inches, each furrow cutting 10 inches. Fuel used wa.s 

 low-grade kerosene with benzine to start. 



No. 6. Clutterbuck Brothers' Bates' Steel Mule. B.Il.P., 26. 

 Draw'bar, 13. Revolutions per minute, 850. Working speed, 2\ miles 

 ])er hour. Pulled 5-furrow, cutting 1\ inches. Fuel used was low- 

 grade kerosene with benzine to start. 



