It is a fact well ascertained, that when apple trees are in bloom, if the _farina_ be gathered from the blossoms of a tree bearing sour fruit, and scattered on those of a tree bearing sweet, the apples produced from these blossoms will partake of the flavour of both trees. In this way the flavour of fruit may be changed for the better--a matter worthy of note, though perhaps not very profitable in practice. From Munich, Germany, we learn that Dr Vogel has announced the important discovery, that sulphuric acid, diluted with a certain proportion of water, and then applied to saw dust, to old linen, to paper, &c. will change these substances into gum and saccharine matter. M. Chaptal, somewhere in his book on chymistry, has ventured to offer his opinion, very modestly however, that even the chemical art of making gold (the great secret of the philosopher's stone) will yet be discovered--that chymists will yet be convinced that all matter is the same, only different modifications. _Calculation of the Period of a Second Deluge._--According to the calculations of the learned astronomer of Bremen, M. Olbers, after a lapse of 83,000 years, a comet will approach to the earth in the same proximity as the moon; after 4,000,000 years it will approach to the distance of 7,700 geographical miles, and then, if its attraction equals that of the earth, the waters of the ocean will be elevated 13,000 feet, and a deluge will necessarily ensue! after a lapse of 220,000,000 years, it will clash with the earth. During the late inundation of the Rhine, a hare, dislodged by the water took refuge in a tree. One of the boatmen who were traversing the inundated country, in canoes, to pick up the sufferers, observed the hare, steered for the tree, and without making his boat fast, climbed hastily up to seize the poor animal. The hare perceiving his danger, sprang from the tree into the boat, which was put in motion by the leap of the hare, and floated down the stream, leaving the boatman in his place upon the tree, in the disagreeable necessity of watching the rise of the waters. The Rhetorical Society at Cortryk, in the Netherlands, has lately offered a gold, and a silver medal, as a prize for a poem of 100 lines, and an epitaph of 12 lines, upon Kotzebue. From a London paper we have the following advertisement--A _new species of man_. Among the wonders of nature none have exceeded this extraordinary phenomenon--a man covered with scales, that rattle at the touch, is now in exhibition at the public rooms, 23, Bond Street. Physicians and natural philosophers will find an extensive field open for their inquiries.