INDEX 



Water-turbine, 183 



Water-wheel, 183 



Weathering of rocks, 8 



Weeding, 24, 222-6 ; clean, 222-3, 225-6, 

 236, 243; costs, 223; three-weekly 

 system, 222-3 > circle, 224-5 5 costs, 

 225 ; by cultivators and disc-ploughs, 

 224 ; coolie tasks, 75 



Weeds, for preventing soil-wash, 225-6, 

 226, 226-7, 231-5' 245 



Weight of rubber, loss on voyage, 217 



Wells, 221 



Wheel, water, 183 



White ants, 275-6 ; and jungle timber, 

 69 ; and woodwork of buildings, 287 ; 

 and chankolling, 228 ; and Forties, 

 261-2; freedom of lalang land from, 



75 



Wide-planting, reasons for, 114-5 5 Lyne's 

 arguments in favour, 117-8; and in- 

 crease in girth, 115 ; yields with, 117, 

 119-120; and longevity of trees, 120 ; 

 and costs of planting, manuimg and 

 tapping, 120 ; effect on young trees in 



dry season, 120-3 ; caf e in selecting 

 seedlings, 123 ; overruling of managers, 

 124 



Wind-broken trees, treatment, 104 

 Wintering of trees, 49 

 Wire-rope carriers for latex, 181 

 Wood. See Heart- wood, Sap-wood 

 Wooden tables, objections to, 139, 140 

 Worm rubber, 138, 193-4 

 Wounds on trees, 126-7 



XYLOBORUS. See Beetles, Boring 



YIELDS, variations among trees, 171 ; 

 and number of cuts, 158, 161, 166-7 ; 

 and frequency, 154, 154-7, 160, 162, 

 163-6 ; and system of tapping, 160-2, 

 166; and depth of cut, 149-150; and 

 direction of cut, 142; and planting 

 distance, 114, 116-7, 119-20; from 

 renewed bark, 158 ; increased by 

 cultivation, 120, 230 ; effect of coolie 

 tasks, 173-4; best yielding months, 

 174 



