, 512

Voandzou, 371

Voelcker (Dr.), analysis of quinoa, 310

Volatile or essential oils, 565

_Vuelta abajo_, the best class of Cuba tobacco, 613
_arribo_, the inferior kind of ditto, 613

Vulpinic acid, 488

Wabessepin, a wild American potato, 372

Wages paid in the Mauritius, 150

Walnut, oil from, 510

Wangle, oil seed, 533

Watappinee, an Indian edible root, 372

Water, proportion of in different kinds of wheat, 221
quantity in potatoes, 227
for making starch, 341

Wax berries, 546
palm, 541

_Weinmaunia_, bark of, 499
_racemosa_, 505

Weight per bushel of crops in New Brunswick, 253
of coffee per bushel, 47

Wellstead (Lt.) on Socotro aloes, 629

Westring (Dr.) on the Swedish lichens, 489-90

West India ginger, 418

Wheat, weight of, as an index of value, 236
imported, 218
flour do., 218
culture, statistics of, 220
annual produce of, 219
analysis of, by Boussingault, 244
average price of, 249
best soil for, 247
consumption of in England, 248
produce of in England and Wales, 248
information respecting, 10
starch of, 331-35-36-37, 343
composition of the ash of, 241
yield per acre, 240
flour, various analyses of, 237

White pepper, statistics of, 428

Whisky, quantity of maize used for, 271

Wilcockes on Paraguay tea trade, 135

Williams's Middle Kingdom, extract from, 105

_Willoughbeia edulis_, 378

Wilson (Mr. T.) on the cost of producing sugar, 189

Wilson's rice-cleaning machine, 290

Winnowing coffee, 51
machine for tea, 116

Woad, 452

Wood dyes, 449
oil, 511
(Mr.) on indigo culture, Wool manufacture, oil consumed in, 510

Wray's practical sugar planter, 140

_Wrightia tinctoria_, 463

_Xanthoxylum piperitum_, 421
_ochroxylon_, 460

_Xiguilite_, the indigo shrub, 460

_Xylocarpus granatum_, 519

_Xylopia aromatica_, 421

Yam, back, 333, 335, 337-38-39, 362

Yams, varieties of cultivated, 362

Yampah root, 376

Yellow berries, 443

Yerba, Spanish and native name for the Paraguay tea tree, 133

_Yucca amarga_, 331

Yucca, the Peruvian name for cassava, 367, 375

Zamia, arrowroot obtained from, 319, 352
_pumila_, 330

Zanzibar, clove plantations in, 400

_Zea Mays_, description of, 260

_Zingiber officinale_, 414

_Zizania aquatica_, 284