INDEX 



463 



Poplar, yellow, posts, 329 



— , — , veneer cores, use of, 108 



— , yield in pulp, 37 



Portugal, cork production in, 433 



Post, cost of treating, 32Q 



— , (circumference 18 in.), equivalent, 15 



— , equivalent, 15 



— , fence, annual consumption and wastage, 



S 

 — , — , wastage, 5 

 — , general, 326 



— in place, illustration of, 32; 

 — , number used, 326 



— ,. preservative treatment, 328, 329 

 — , principal sources of, 328 

 — , requirements for desirable, 327 

 Potts, H. F., on rubber, 413 

 Power used in pulp mill, 45 

 Precious metal mines, timber used in, 332 

 Prentice, H. W., on cork, 443 

 Preservative treatment of poles and piling, 

 321 



posts, illustration of, 328 



, shingles, 369, 370 



Preservatives, kinds of, 294 

 Press rolls, paper, 56 

 Prices, excelsior, 425 



— of charcoal, 245 



dry distillation products, 230 



fuel wood, 348 



— per thousand board feet, lumber, 10 

 Pritchard, T. W., on wood distillation, 234 

 Process, distillation of, hardwood, 203, 204, 



205 



— of making maple syrup and sugar, 304 

 wood pulp manufacture, 27 



— , softwood distillation, description, 228 

 Processes used in making charcoal, 238 

 Producing hemlock bark, cost of, 69 

 Production, annual, of lumber, 6 

 — , — , — veneers, 94 



— by dry distillation system, 229 



— , cost of by softwood distillation, 230 

 — , lumber, by states, 7 



— of charcoal, annual, 236 



poles and piling, 310 



rubber, 410 



, methods, 404 



sugar maple and syrup, 380 



— , shingles, annual, 353 



Products, forest, wastage in production of, 12 



— utilization of hardwood distillation, 220 



Products, utilization of, in softwood distil- 

 lation, 232 

 — , value of, in hardwood distillation, 218 

 Prop, equivalent, 15 



— timber, 3^ 



Protection of ties against mechanical wear, 



294 

 Pseiidolsuga taxlfolia, 9 

 Pterocarpus santalinoides, 419 



— santalinus, 418 



Pulp and papermaking, history of, 20 



— , bleaching, 51 



— , collecting (soda), 50 



— , — of, on lap or press machine, 44 



— , coloring, 54 



— , drying, 45 



— , mechanical, the manufacture of; 31 



— mill, photograph of, 25 

 , power required in, 45 



, requirements for the establishment of, 



— , sizing and loading, 53 

 — , soda, manufacture of, 48 

 — , — , washing, 49 , 



— stock, screening of, 35 



— , sulphate, manufacture of, 47 

 — , — , cost of producing, 45, 46 

 — . — , manufacture of, 38 

 — , yield of, from different woods, 37 

 Pulpwood, annual consumption and wastage, 

 5 



— , of, 23 



— , consumption by states, 26, 27 



, table of, 29 



— , forecast of future requirements, 18 



— , logging and transportation, 28 



— , value of, 30 



— , wastage, 5 



Pulpwoods, imports of, 57 



— , requirements of desirable, 22 



Pusey- Jones Co., photograph by, 39 



Qualities desired in box woods, 249 



cross ties, 267, 268 



Quebrachia lorentzii, 79 



Quebracho, description and production of, 79 



— , export of from Argentina, 81 



— for tanning, 60, 63, 64, 65, 79, 80, 81, 82 



— , imports to United States of, 82 



— , tannin contents of, 64 



— , weight of, 79 



