Dr. Cyrus Thomas, of Illinois, a member of the United States Entomological Commission, kindly reports to young men with an inclination to go West, that the loss from the chinch bug in Illinois alone, in 1850, was estimated at $4,000,000; an average of $4.70 for every man, women, and child then living in the State. In 1864 it destroyed three-fourths of the wheat, and one-half of the corn crop throughout the Valley of the Mississippi, a loss to the farmers' of $100,000,000. Crossing the river they meet the Rocky Mountain Locust, a larger and even more destructive insect. Not to put too fine a point, we say nothing of wind, storms,, etc., and conclude to stay East.

Prof. Huxley's Physiographia: Appletons,. 1878, - is a truly valuable scientific work, easily comprehended. At present, he says, the deepest mine is near Wigan, being 2,445 feet. Ex-penments on the temperature at different depths, while sinking the pit, showed that the average increase is about 1° Fahr. for every fifty-four feet. In other sinkings, different results have been obtained, the rate of augmentation being affected by the character of the rocks, and it will not be far wrong to assume the average increase of 1° for every sixty-four feet. At the depth of only a few miles, the heat would be sufficient to fuse any known rock, and' whatever the general state of the earth's interior, there must be at least masses of molten rock. No less than 10,000 hot springs are said to exist within the area of the Yellowstone Park. On the sources of carbon in plants, the book is very full and satisfactory, the supply being from the atmosphere.