EFFECT OF STRONG MENTAL IMPRESSION.--A strong mental impression carried into sleep is conducive to impressibility. Inspector Jewett, of the Brooklyn Police, was so worried about the lost pistol of John Kenny, who had shot a car-driver, as he wanted the weapon in evidence against the ruffian, that he dreamed about it. He saw it in a certain saloon, in a certain place, and the next morning went to the saloon and found the pistol exactly where he saw it in his dream. The rescue of the crew of the “Sparkenhoe,” November 30, 1875, by Capt. Adam S. Smalley, as told by him, is a fine illustration of impressibility in sleep. He sailed from Bordeaux November 24, 1875, in the brigantine “Fred Eugene,” bound for Key West, and soon encountered stormy weather. When six hundred miles at sea, on the night of the 29th, he suddenly awoke from sleep, deeply impressed with a dream, in which he had seen a number of men in great peril. He related this to his wife, adding that he hoped no shipwrecked crew needed his assistance. At midnight, he again retired, and again the vision was repeated with more distinctness, and the men appearing on a wreck needing the utmost dispatch to rescue them. The Captain went immediately on deck, and without any assigned reason, changed the course of the ship two points, and, giving orders to be called at daylight, retired, and slept till the appointed time. Going on deck at dawn, and sweeping the horizon with his glass, he discovered a ship far to the windward, with a signal of distress displayed. He endeavored to work his vessel up, but with short sail and heavy sea, most of the forenoon passed, and a long distance remained. He was resolved to take a long tack, and not change his course until prompted to do so by the same impulse that bade him do so the night before. More sail was made, although prudence forbade, in the face of a gale at any moment threatening to break, and all the men stood at their posts for over an hour, awaiting the orders for tacking. At last the prompting came, and going about, the vessel reached a point two miles to the leeward of the distressed ship, where her three boats, containing twenty-three men in all, had put off to intercept the brig. They were taken on board, the boats cut loose, and all sail taken in as quickly as possible, and in ten minutes a fierce hurricane lashed the sea to foam. The gale raged four days with unabated fury, so that, had they not been rescued at the very moment they were, they would have certainly perished.