:o Feb., 191 i] 



Irrigation. 



117 



In practice, the driver always ride.-, on the machine and so adjusts his 

 weight and the tilt of the machine as to secure the greatest or least amount 

 of crowding to make a straight even finish. In rough lumpy ground, it 

 is good practice for one man to drive and another to regulate the machine, 

 while it is often necessary that both men ride on it to keep it well buried. 

 r. is scarcely a case where a permanent weight can be applied, as it is so 

 often necessary for the position of the weight to be changed. The channel 

 will now have the appearance shown in section in the sketch No. 39, and is 

 quite good enough for all practical purposes. It may, however, be 

 strengthened and made more effective by ploughing out the areas shown in 

 sketch No. 40 by vertical lines, and shovelling the earth into the position 

 shown bv horizontal lines. The waterway will be considerably increased 

 and the channel will have the appearance shown in No. 41. 



-\2. THE CROWDER OR DELVliR. 



The crowder shown on this page, and which is sold for ^3 los., is 

 cajjablf of l)eing drawn by two good horses and is sufficient for the pur- 

 po.se of making the subsidiary channels or head ditches required on most 

 farms. Larger sizes are made and will be found very useful in making 

 channels or drains which will carry cdnsiderable volumes of flow. They 

 will be of special value on large holdings and stations, where a few extra 

 horses are of little or no ojnsideration. and where it often happens that 

 flows from artesian bores and other sources of water supply are required 

 to Ik- carried in considerable volume to outlying tanks and storages; or 

 for the jnirpose of ((jiicentrating and accelerating the flow of water along 

 the Ix'ds of usuallv drv watrr-cours.s which are of such common occur- 

 rtiKt' in connexion with the river systems of northern Victoria. 



Tin- crowder is also on*- of the most u.seful of t(X)ls for making road 

 formations. The crowder, buck.scrai)er and smoother (ii\ .some cases 

 thf crowder and the smoother only) form a superior outfit to the ordinarv 

 scoop methods, where surfaces are flat and earth may be borrowed clo.se 

 alongside the formation. If the earth has to be borrowed from the edg<s 



