[23] The theory of the original incandescence of the earth has been much debated, but we believe it is gaining ground among geologists. THE MANIA FOR TULIPS IN HOLLAND. The inordinate passion, which at one time prevailed for Tulips, amounted to actual madness, and well deserved the name of Tulipomania, by which it is distinguished. The Tulip was introduced into Europe from Constantinople in the year 1559, according to Gesner. After it became known to the Dutch merchants and nobility at Vienna, it became a most important branch of trade in Holland, and they sent frequently to Constantinople for roots and seeds of the flower. In the year 1634, and for three years after, little else was thought of in Holland but this traffic; all embarked in it, from the nobleman to the common laborer, and so successful were many that they rose rapidly from abject poverty to affluence; and those who had been barely able to procure the most scanty means of subsistence were enabled to set up their carriages, and enjoy every convenience and luxury of life; indeed, when we read of the enormous sums paid for a single root, we can feel no surprise at the immense and rapid fortunes which were made. It is on record, that one wealthy merchant gave his daughter no other portion to secure an eligible match than a single root. The plant to this day bears the name of the "marriage portion." We find that 2 hogsheads of wine, 4 tuns of beer, 2 lasts of wheat, 4 lasts of rye, 2 tons of butter, 1000 pounds of cheese, 4 fat oxen, 8 fat swine, and 12 fat sheep, a complete bed, a suit of clothes, a silver beckess, valued at 2500 florins, were given in exchange for a single root of the tulip called the Viceroy. This mode of barter, being attended with inconvenience, could not be general, and gave place to sale by weight, by which immense sums were made. Single roots have sold for 4400 florins; 2000 florins was a common price for a root of the Semper Augustus; and it happened that once, when only two roots of this species could be procured, the one at Amsterdam, and the other at Haarlem, 4600 florins, a new carriage, and a pair of horses, with complete harness, were given for one; and for the other an exchange made of 12 acres of land: indeed, land was frequently parted with when cash could not be advanced for the purchase of a desired root; and houses, cattle, furniture, and even clothes, were all sacrificed to the Tulipomania. In the course of four months, a person has been known to realize 60,000 florins. These curious bargains took place in taverns, where notaries and clerks were regularly paid for attending; and after the contracts were completed, the traders of all ranks sat down together to a splendid entertainment. At these sales, the usual price of a root of the Viceroy was £250; a root of the Admiral Liefkuns, £440; a root of the Admiral Von Eyk, £160; a root of the Grebbu, £148; a root of the Schilder, £160; a root of the Semper Augustus, £550.