780 Journal of Agriculture. [10 Dec, 1910^ 



53. Trifolium repens (White Clover). — Chief weed seeds present were 

 Spurrey, PLantain, and White Cockle (Lychnis alba). One per cent, 

 hard. 



54. Trifolium repens (White Clover). — The sample was obviously- 

 dyed, probably to disguise old seed. A number were pierced by borers, 

 the remains of which were present in the sample. The weed seeds in- 

 cluded Plantain, Sorrel, a species of Composite, Alsike Clover {Trifo- 

 lium hyhriduni), and Purple Cockle {Agrostenima Githago). Five per 

 cent. hard. 



55. Bromus unioloides (Prairie Grass) (local). — Offered to seedsman 

 for sale; 6 per cent, of grains filled with smut; 72 per cent, germinated. 

 Contained burrs oi Medicago denticidata (Burr Medick) ; 8 per cent. 



BUILDING HINTS FOR SETTLERS. 



XIV.— AIALLEE ROLLER. 



A. S. Kenyon, C.E., Engineer for Agricidture. 



The accompanying drawings show the usual type of roller in the Mallee 

 districts. I'he roller itself varies in length from 8 feet to 12 feet, and 

 in diameter from i ft. 6 in. to 3 ft. 6 in., and may be either a log, art 

 old boiler, or a specially constructed iron cylinder. 



Round timber is preferable to sawn for the framework, especially 

 fui pole and brace, if a suitable natural fork can be obtained. Ttie 



pole is usually about half as long again as the roller. The angle formed 

 by brace should be such that the scrub is bent forward and not brushed 

 aside. This is very important, as the brace, if properly fixed, does a 

 large amount of the work of breaking down the mallee. The framework 

 is fixed together with clamps. 



The wheel is an ordinary dray wheel, the axle of which after passing 

 through wheel and arms of bridle is turned up and works in a hole at 

 the end of the pole. On the vertical portion of the axle is an iron collar 

 fastened with a set screw. The end of the pole rests on this and may be 

 rai.sed or lowered by altering the position of collar. The bridle is 

 made of 3-in. by f-in. wrought iron, bolted together as shown and having 

 a slot 2 inches by ,J inch in front. The bridle moves freely on the 

 axle and will come to any position required, by the raising or lowering 

 of end of pole. 



The chain is connected to a piece of iron bolted to the frame as shown. 

 The chain passes under the brace and through a hook on the pole, which 

 converts the chain from a diagonal to a direct pull parallel to the pole. 

 The hook is made of i^-in. iron threaded for a nut on outside of the 

 pole. The chain runs through the hook but is not fastened to it. The 

 loose end of chain is fastened to a piece of iron, i| in. x | in. x i ft., 

 which passes through the slot in the bridle. This piece of iron has holes 

 in it for a pin, so that, when the chain is tight, the pin, being placed in 

 hole nearest the back of bridle, will draw the wheel. 



The axle of roller is fixed to a cross piece of 4-in. x f-in. wrought 

 iron, welded at the join and a hole punched for the axle. The axle 

 projects at each end and works in a block of hardwood which is bolted 

 to iron supports with ^-in. bolts. The supports are of 4-in. x J-in. 

 wrought iron, bolted to framework as shown, with |-in. bolts. 



