Now, with the implements, machinery and knowledge of mechanics of today, people have found out that no man can be good enough nor bad enough to cause a frost. After having found out these things are contrary to the laws of nature, they began to raise more than one kind of crop. If the frost strikes one they have the other; if it happens to strike all in that locality there is a surplus somewhere else, and that surplus is distributed by railways and steamers and by the thousand ways that we have to distribute these things; and as a consequence the agriculturist begins to think and reason, and now for the first time in the history of the world the agriculturist begins to stand upon a level with the mechanic and with the man who has confidence in the laws and facts of nature. I saw there their musical instruments, from the tomtom (that is a hoop with two strings of rawhide drawn across it) to the instruments we have that make the common air blossom with melody. I saw their ideas on ornaments, from a string of the claws of a wild beast that once ornamented the dusky bosom of some savage belle, to the rubies and sapphires and diamonds with which civilization today is familiar. I saw the books, written upon the shoulder-blades of sheep, upon the bark of trees, down to the illustrated volumes that are now in the libraries of the world. I saw their ideas of paintings, from the rude daubs of yellow mud, to the grand pictures we see in the art galleries of today. I saw their ideas of sculpture, from a monster god with several legs, a good many noses, a great many eyes, and one little, contemptible, brainless head, to the sculpture that we have, where the marble is clothed with such personality that it seems almost impudence to touch it without an introduction. I saw all these things, and how men had gradually improved through the generations that are dead. And I saw at the same time a row of men's skulls--skulls from the Bushmen of Australia, skulls from the center of Africa, skulls from the farthest islands of the Pacific, skulls from this country--from the aborigines of America, skulls of the Aztecs, up to the best skulls, or many of the best of the last generation; and I noticed there was the same difference between the skulls as between the products of the skulls, the same between that skull and that, as between the dugout and the man-of-war, as between the dugout and the steamship, as between the tomtom and an opera of Verdi, as between those ancient agricultural implements and ours, as between that yellow daub and that landscape, as between that stone god and a statue of today; and I said to myself, "This is a question of intellectual development; this is a question of brain." The man has advanced just in proportion as he has mingled his thoughts with his labor, and just in proportion that his brain has gotten into partnership with his hand. Man has advanced just as he has developed intellectually, and no other way.