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As already mentioned, some plants of this family are furnished with an additional contrivance for withstanding droughts, viz., oblong tubers, which, buried deep enough beneath the soil for complete protection from the scorching sun, serve as reservoirs of sap and nutriment during those rainless periods which recur perpetually in even the most favored spots of Africa.

We see this acted on by farmers and gardeners in their frequent exchanges of seed, tubers, etc., from one soil or climate to another, and back again. During the convalescence of animals, we plainly see that great benefit is derived from almost any change in the habits of life.

In a hundred parts are found but two of nitrogen, eighteen of starch, three of sugar, two-tenths of fat, seven-tenths of saline matter, and seventy-five parts of water. The Sweet-potato, Yam, and Artichoke are all of the same character. Other Tubers, the Turnip, Beet, Carrot, and Parsnip, are in ordinary use. The turnip is nine-tenths water, but possesses some valuable qualities.

Another, the mokuri, an herbaceous creeper, the tubers of which, as large as a man's head, it deposits in a circle of a yard or more horizontally from the stem. On the water-melons especially, the elephants and other wild animals revel luxuriously. Such was the desert Dr Livingstone and his party proposed to cross when they set out with their wagon on the 1st of June, 1849, from Kolobeng.

The stem is about an inch in diameter at the base, and six or seven feet long. A bud appears at nearly every inch of the otherwise smooth stem. These plants give forth tubers of irregular shape, in substance like a parsnip, about six inches long and four thick. The tubers, after being scraped and rinsed, are ground, or rather grated against a wheel with a brass grater as a tire.

It was one of the best potatoes ever grown, very early, and splendid in quality, and it was unfortunate that he parted with it so cheaply, though, of course, the purchaser of the first few tubers had no idea of its immense potential value, and possibly, like so many novelties, it might have proved a failure.

Mary, however, had hopes, that by cultivation, we might produce larger ones; so we collected all the tubers we could fall in with, and kept them for seed. "Out of the pods of the honey-locust, we brewed a very agreeable sort of beer; but we were able to extract a still more generous beverage from the wild or fox-grapes that grew in all parts of the valley.

Mohamad proposes to go to Katanga to buy copper, and invites me to go too. I wish to see the Lufra Kiver, but I must see Bemba or Bangweolo. Grant guidance from above! 2nd June, 1868. In passing a field of cassava I picked the pods of a plant called Malumbi, which climbs up the cassava bushes; at the root it has a number of tubers with eyes, exactly like the potato.

It would undoubtedly be mistaken for an auk, when seen from a distance, either on the wing, or when diving and quietly swimming about the retired channels of Tierra del Fuego. Horticultural Transact., vol. v. p. 249. Mr. Caldeleugh sent home two tubers, which, being well manured, even the first season produced numerous potatoes and an abundance of leaves.

Is cultivated for the sake of its tubers, similar to the potatoe; but they are not generally esteemed. ASPARAGUS. Asparagus officinalis. A very delicious vegetable in the spring, and well known to all amateurs of gardening. There is a variety called the Gravesend Asparagus, and another called the Battersea; but it is the richness of the soil and manure that makes the only difference.