culture throughout the world. There are three species of cotton: tree-cotton, shrub-cotton, and herbaceous cotton. The tree-cotton is cultivated to considerable extent in northern Africa, and produces a fair staple of cotton for commerce; being produced on trees from ten to twenty-five feet high, it is not so easily gathered. The shrub-cotton is cultivated in various parts of the world, particularly in Asia and South America. Growing in the form of small bushes, it is convenient, and the staple is fair. But these are both inferior to the herbaceous cotton. This is an herb growing annually, like corn, a number of feet in height, more or less according to soil and season, and producing the best known cotton. Under these species there are many varieties: we need speak only of the varieties of herbaceous cotton. Writers vary in their estimates of varieties; some say there are eight, and others put them as high as one hundred. This is a question of no practical moment. The sea-island cotton, called also "long staple" on account of its very long silky fibres, is the finest cotton known. Its name arose from the fact of its production in greatest perfection on the low, sandy islands near the coasts of some of the Southern states. It does well on low land near the seashore. The saltness and humidity of such locations seem peculiarly favorable to its greatest perfection. It yields about half as much as the "short staple" called Mexican and Petit gulf cotton, and known in commerce as upland cotton. But the sea-island, or long staple, sells for three or four times as much per pound, and, hence, is most profitable to the planter, in all regions where it will flourish well. The Mexican is very productive on most soils, and is easily gathered and prepared for market. There are quite a number of other varieties; as, banana, Vick's hundred-seed, Pitt's prolific, multibolus, mammoth, sugar-loaf, &c., &c. The sugar-loaf is highly commended, as are some of the others named. They have had quite a run among seed-sellers. Most of these varieties are the improved Mexican. It is well to get seed frequently from a distance; but any extravagant prices are unwise. Improvement of cotton-seed is an important part of its most profitable culture. While much said about it by interested parties is doubtless mere humbug, yet there is great importance to be attached to improvement of seed. This is true of all agricultural products, and no less so of cotton than of others. Two things only are essential to constant improvement in cotton-seed--_selection_ and _care_. Select from the best quality, producing the largest yield, and maturing early; pick it before much rain has fallen on it after ripening; dry it thoroughly before ginning, and dry it very thoroughly after it is clear of the fibre, before putting it in bulk. Cotton-seed, without extra care in drying, has moisture enough to make it heat in bulk, by which its germinating power is greatly impaired.