CITY DOMESTIC TELEGRPH.—A number of gentlemen are making arrangements for the purpose of setting in operation a Metropolitan Telegraph for communication with all parts of this city. The present idea is to establish in the upper part of the town ten offices, with House's printing instrument, and wires connecting with the office in Wall st. They will transmit brief messages for a very small sum, and must necessarily do a large business. In fact, it is not improbable that the telegraph may be so extended as to do nearly all the real business correspondence between up town and down town. The post office is too slow, and we want such a telegraph. ANOTHER AMERICAN YACHT FOR EUROPE. —The beautiful American yacht Silvie, of 105 tons burden has left this country under the comirand of Capt. Comstock, ior the purpose of contending for the prize at the yacht race off Cowes, on Tuesday the 2nd of August next. The Silvie was built by Mr. George Steers, the successful builder of the America, and at the same time. It is confidently stated that the Silvie is the fleetest sailer of the two, and on that account her success in coming off the victor is sanguinely expected. SHIP CHALLENGE.—Chambers & Heiser of this city, have offered to run their clipper jhip Sweepstakes a race of 2,000 miles out ind back; against any other ship for $10,000, the rules and regulations to be prescribed by She New York Yacht Club. COTTON PICKER.—A. H. Burdine, of Pano-La Co., Miss., has invented a machine for picking cotton from the stalk, by which, it is said, one hand can gather as much as two without it, and in much better condition.— [Charleston Mercury. [We hope this is true, but to be successful it must do more than pick twice the quantity of one hand. DOCK FAILURE.—A correspondent of the * Savannah Courier" pronounces the Naval Dock recently constructed at Pensacolaa failure. The frigate Columbia was taken up in it, but the dock swagged in the centre, and the ship was so pressed that the doors of her ward room could not be closed. It was also found impossible to take the dock, with the ship on it, into the basin prepared to receive it. TABLB MOVING ABROAD.—By the recent accounts from Europe the table moving phenomenon had become quite a rage among the savans of Paris; and had furnished a theme for fact and fancy articles in the papers.— The spirit rappings had also found believers among some of tne sages in England. Robert Owen, the famous communist, and now nearly 80 years of age, has become a believer in communicating with departed spirits by raps on a table. We do not know what the next movement will be, but we hope it will be a movement of Prof. Porter's celebrated aeroport in the atmosphere on its journey to California, Japan, or some other place far away on the other side of Montezuma swamp.