SCIENTIFIC AGREEMENT.--A California paper tells the story of a showman who delighted an "appreciating public" with a view of the Mammoth Cave. It was his custom, as each scene was exhibited, to explain it. When the great cave came to view, he stepped forward and said: "Ladies and gentlemen, this is a great phenomenon, indeed the greatest in the world. The learned of all nations have visited it; but none could agree as to the cause which had produced it; they all came to this grand conclusion, that it was one of the most tremendous holes in the ground they had ever seen." GERANIUMS. (_From Mrs. Hale's New Household Receipt-Book._) THE shrubby kinds are commonly increased by cuttings, which, if planted in June or July, and placed in the shade, will take root in five weeks. They are the most tender, and when placed out of doors, should be defended from strong winds, and be so placed as to enjoy the sun until eleven o'clock in the morning. As the shrubby kinds grow fast, so as to fill the pots with their roots, and push them through the opening at the bottom, they should be moved every two or three weeks in summer, and the fresh roots cut off. They should also be newly potted twice in the summer: once about a month after they are placed abroad, and again towards the end of August. When this is done, all the roots outside the earth should be pared off, and as much of the old earth removed as can be done without injuring the plants. They should then be planted in a larger pot; some fresh earth should first be laid at the bottom, and on that the plant should be placed, so that the old earth adhering to it may be about an inch below the rim of the pot; it should next be filled up, and the pot slightly shaken; the earth must then be gently pressed down at the top, leaving a little space for water to be given without running over the rim; finally, the plant should be liberally watered, and the stem fastened to a stake, to prevent the wind displacing the roots before they are newly fixed. As the branches grow, and new leaves are formed at the top of them, the lower ones may die, and should be plucked off every week. Geranium slips should be planted in May, June, or July, taking only the last year's shoots, from which the leaves must be stripped. When planted, give them water, and place them in the shade: when they have taken root, let them have the sun in the morning. The slips chosen for cutting should not be such as bear flowers; and they should be inserted about half their length in the earth. Geraniums, except the shrubby kinds, require shelter from frost only, and should have free air admitted to them, when the weather is not very severe. In sultry weather, they should all be watered liberally every morning, except some few of a succulent nature, which must be watered sparingly; the latter may be known by plucking a leaf from them. Geraniums may be watered three times a week, when not frosty, in winter.