15 Oct., 1919.] 



Pear Growing in Victoria. 



591 



nature has not provided such desirable adjuncts to the work of drainage 

 as natural outlets, it is necessary to provide one or more open ditches 

 following the natural flow of the surface water, and the system will 

 have to be arranged accordingly, running the lateral drains into the 

 open ditches where possible. It sometimes happens that this is not 

 possible, and the open-made ditches or natural water-courses have to be 

 supplemented with main pipe drains, one of which is indicated in the 

 diagram. 



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Plate 22. 



A. Junction of lateral with main pipe drain (right method). B. Lateral entering 

 main pipe against the flow (wrong method). C Lateral entering main pipe at right 

 angles (wrong method). 



Where the lateral drains are run straight into open water-courses, 

 the junction can be made at direct right-angles, but in the case of main 

 pipe drains being used to receive the drainage from the lateral drains, 

 the junction should be angular and with the flow. In plate J^o. 22, 

 the right and wrong methods of connecting pipe drains are shown. 



Generally, 2-in. tiles will be of sufficient capacity to carry off the 

 drainage water from the lateral system, but where the drains are very 

 long and the area to be drained is large, 3-in. tiles might be used with 



