INDEX 



ACID, acetic, in coagulation, 134, 138 ; 

 citric, in soil analysis, 247 ; hydro- 

 chloric, in testing for lime. 244-7 



Acidity of soil. See Soil, Acidity 



Acreage, checking of, 296-7, 298 



Aeration of soil. See Soil, Aeration 



Age of trees, reckoning (stumps), 91 ; 

 age for tapping, 141 



Alternate-day tapping. See Tapping, 

 Alternate Day 



Analysis of rubber, as test of quality, 130; 

 of soil, 14, 247 



" Angle " creping mill, 192 



Antiseptic precautions, with latex, 134-7 ; 

 in factory, 139, 140 



Ants, white. See White Ants 



Assimilation of carbon. See Carbon 



Assistant's outlook, 184-6 



Availability of food in soil, 12, 228, 247, 

 250 



BACTERIA, action in soil formation, 8 ; 

 early ideas of, 18 ; rate of reproduction, 

 18; sizes, 19; organisms preying on, 

 15, 16 ; require air, 12, 20, 24 ; require 

 water, 253 ; essential to vegetation, 6, 

 17, 23, 118-9: and nitrogen supply, 

 17, 19-20, 21-22, 23, 24, 232, 248-9; 

 soil drainage and, 23, 59, 119; culti- 

 vation and, 23-24, 228 ; assisted by 

 lime, 14, 16, 23, 250; in root nodules, 

 21-2, 232 



Bacteria and plant disease, 256 



Bark, 36, 37, 40, 43 



renewal, factors affecting, 112, 114, 



160, 169-170; period necessary 

 for, 154, 157, 160, 162, 163, 166 



renewed, yield, 158 



shavings and rubber, 137, 188, 194, 



195, 196, 198, 199 



Basal V. See Broad V 



Basic slag, 23, 249. 250, 252 



Basket plants, 84, 85 



Ba^t (phloem), 38, 39 



Beetles, boring, 278-281 



Bent gouge, 175 



Bergsort on the organism, 37-8 



Biscuit rubber, 210 



Blanket crepe, 199-200 



Block rubber, 193 



Bridges, 58-9, 62 



Broad (basal) V, 146, 150-4, 160-2, 162, 

 163, 166 



Buckets for latex, 178 



Bullock ploughs, 225 



Bungalows, 287-8 



Burning, after felling, 70-4 ; precau- 

 tions, 70-1 ; season, 72; among young 

 trees, 71-4 ; and costs, 74 



Burning of soil, 15, 96 



Burrs, 145, 147, 149, 269, 270-4 ; potas- 

 sium as cure, 252 



CACAO, 251, 254,284, 295 



Cambium, 36, 37, 40, 145 



Canker, 270 ; potassium lor, 252 



Capillary action in soil, 10-11 



Carbon, amount in air, 45 ; assimilation, 

 32, 44-9, 120-3 5 rate of, 44 



Carbonic acid gas, 32, 38, 44-9; forma- 

 tion in soil, 8, 21 



Carlyle on matter, 37 



Carriers for latex, 178; wire-rope, 181 



Cases for packing, 216-7 



Catch-crops, 282-3 



Cell, its structure, 2-3 ; division, 3-4 ; 

 powers and functions, 4-5, 39 



Census returns of trees, 286 



Ceylon, land grants in, 50; elevation of 

 plantations, 55 ; planting distances in^ 

 33; costs, of weeding, 223; of produc- 

 ing rubber, 218, 219; of coolie-lines, 

 291 ; washing mill, type favoured, 192 



Chankolling, 76, 222, 224, 227, 228, 228- 

 9, 230 



Chlorophyll, 32 



Chloroplasts, 46 



Circle-weeding, 224-5 



Citric-acid test of soil, 247 



Clay soils. See Soils, Clay 



Clean-weeding, 222-3, 225-6, 236, 243 ; 

 costs, 223 ; on hilly estates, 225-6, 

 236, 243 



Cleanliness in tapping, 168, 172 



Clitoria, for preventing soil wash and as 

 green manure, 236 



Close-planting condemned, 108; effect 

 on foliage, 44, 46, in, 112-3, Ir 4> on 

 plant food manufacture, 46 ; on roots, 

 1 1 1-2 ; on bark renewal, 112, 114, 160, 



301 



