Planche, his memoir on the sagos, 315

  Plumeria, essences of, 524

  Plectranthus graveolens, 573

  Plough used in Brazil, 184

  Polygonum fagopyrum, 260

  Poa Abyssinica, 308

  Pomegranates, for dyeing, 440

  Potash an important element in maize, 267
    large quantity in maize, 264

  Potatoes, mode of keeping in Peru, 361
    average weight per bushel in New Brunswick, 253
    composition of, 227
    imported, 218
    composition of, 264
    analysis of varieties, 362
    yield per acre, 356

  Potato, information respecting, 10
    meal, syrup made from, 197
    the wild, of North America, 372
    starch in, 330
    starch, used to adulterate arrowroot, 349
    test for detecting, 349
    starch, 334, 335, 337, 362
    crop of the United States, 361
    disease, 358
    proposed cure for, 359, 60
    crop in Ireland, 358
    varieties of, 358
    imports of, 359
    crop in France, 361

  Poisons, 627

  Pomme des Prairies, of the Canadians, 373

  Pounding coffee, 61

  Population of Great Britain, &c., 87
    of China, 86, 91, 298

  Porto Rico, exports of coffee, 77
    cost of producing sugar in, 189
    production of coffee in, 41
    exports of tobacco, 615

  Poonac, as manure, 50
    549, 552, 561

  Pomegranate bark, 493, 495

  Poonay oil, 511-13

  Polygonum tinctorium, 453

  Pongamia glabra, 521

  Pogostemon patchouly, 573

  Poppy, culture of, 581
    oil, used to adulterate olive, 532
    509-10-11-18

  Polypodium crassifolium, used as a perfume, 550

  Preserved Plantains, 323

  Prices, average of sugar, 145

  Prickly poppy, 626

  Princeza snuff, 594

  Prince of Wales Island, clove culture in, 399

  Prosopis pallida, 313

  Protein compounds, 307, 310, 342

  Produce of various plants, 9

  Production, average of various plants, 9

  Provence oil, 531

  Province Wellesley, clove culture in, 400

  Prussia, tobacco consumed by, 596
    production of beet sugar in, 197-98

  Pruning coffee tree, 69

  Psoralia, varieties of, 372

  Pteris esculenta, 380

  Pterocarpus marsupium, 493
    santalinus, 445
    species of, 507

  Pulping mill for coffee, 51

  Purging nut, 625

  Pulse, culture of, 312

  Putchuk or Costus, 438
    638

  Punjaub, proposed culture of tea in, 101

  Pustulatus moss, 486

  Qually, an iron vessel for drying sago, 317