ASPHALT is being dug out of the famous tar lake of Trinidad—the most notable existing source of the material in the world—at the rate of eighty thousand tons per annum. There are still four and a half million tons in sight, but at this rate the supply could not last long were it not that the lake of bitumen referred to is receiving a constant accretion from the bowels of the earth. This accretion is reckoned as amounting to about twenty thousand tons yearly, and would suffice to restore the lake to its original condition if it were allowed to remain undisturbed for a few years. This wonderful lake of pitch has an area of one hundred and fourteen acres, and recent soundings made in the middle of it have shown its depth to be one hundred and thirty-five feet in that part. Near the center it is semi-liquid and bubbling, but elsewhere it has so hard a surface that a man on horseback can ride over it without danger of breaking thru the crust. Scattered over its surface are a number of small islands which have no proper roots in the earth, so to speak, but are composed merely of accumulations of soil, tho trees of considerable size grow on some of them. These islands are not stationary, but are carried slowly from place to place by the movements of the lake. Now and then one of them is entirely engulfed.—Saturday Evening Post.