No one person could be expected to be thoroughly familiar with all the different modes of culture and preparation of every one of the numerous products to be described in this volume; but where my own agricultural experience (of several years in the West Indies and South America) was at fault, I have availed myself of the practical knowledge of those of my colonial friends and correspondents best informed on the subject, and am particularly fortunate in having many valuable essays on Tropical Agriculture scattered through the different volumes of my “Colonial Magazine.”

The discussion of the best modes of culture, properties, manufacture, consumption, uses, and value of the commercial products of the vegetable kingdom cannot be without its value, and the attention of merchants and planters may be usefully directed to various articles, which will be profitable both in an agricultural and commercial point of view; many of which are already sources of wealth to other countries.

The introduction of new objects of industry into the colonial dependencies of the British Empire, is no longer considered a mere subject of speculation, but one well worthy the attention of the eye of science; and the fostering hand of care is beginning to be held out to productions of nature and art, which, if not all equally necessary to the welfare of man, yet certainly merit the attention of the cultivator and capitalist, and have great claims on the scientific observer, and on those interested in raising the manufactures of our country to a higher standard.

Few who have not investigated this subject are aware of the immense number of countries lying in the equatorial and tropical ranges of the torrid zone, many of which, from the value and importance of their indigenous productions, have already attracted considerable notice, and to which still more attention will be directed by European nations as the value of their various products becomes more extensively known.

The homeward commerce which we carry on with our numerous Colonies, with our Indian Possessions, and with foreign countries, is principally in articles furnished by the vegetable kingdom, such as the cereal grains, wheat, rice, maize, &c.; vegetables used in preparing dietetic drinks and distilled liquors, as tea, coffee, cacao, and the sugar cane, grapes, &c.; spices and condiments; drugs; dyes and tanning substances, obtained from the bark, leaves, fruit, and roots of various herbs and trees; the expressed or distilled oils of different plants; fruits in the green, dried, or preserved state; starches obtained from the roots or trunks of many farinaceous plants; fibrous substances used for cordage, matting, and clothing, as cotton, Indian hemp, flax, coco-nut coir, plantain and pine-apple fibre; timber and fancy woods.  These substances, in the aggregate, form at least nine-tenths in value of the whole imports of this country.  There are also several products of the animal kingdom dependent