The 'Ocean Wave' was built for Mr. R. T. Loper by Reany & Naeafy, of Philadelphia, in 1865, iron. She was 87 ft. over all, 19 ft. beam, 7 ft. depth, 2 cylinders each 12 by 18 in., 38 nominal horse-power. The Police Department of Philadelphia bought her. 'Day-Dream,' composite construction, built by the Continental Iron Works, Green Point, Long Island, for W. H. Aspinwall, 1871. Length over all, 115 ft.; length on water-line, 109 ft.; beam, 19 ft.; depth of hold, 5 ft.; draught of water, 7 ft. Her engine was built by the Delamater Works of New York, vertical condensing, 2 cylinders each 14 by 14 in., one boiler 8 ft. long, diameter of screw 7 ft. 6 in., with 10 ft. pitch. She was sold to the United States Government for postal service in the Gulf of Mexico, and is now at New Orleans. The 'Day-Dream' was really the first successful steam yacht, and set the type of pleasure craft for many years; in fact, it is but a few years ago that the style called 'deck-house' yachts went out of use, and they are at present almost entirely superseded by the deeper-hulled, flush-deck yachts. During the early Seventies the steam launch, or open yacht, rapidly multiplied in numbers and seemed to fill a demand for afternoon sailing in the sheltered waters of our seaports, and as preparatory to something better they did good service. The open steam-launch as then used was from 25 to 45 ft. long, and 6 to 8 ft. wide, usually with vertical engines, and used a pipe condenser and boiler of upright form, generally of tubular construction. After the open launch came the small yacht, having a small cabin enclosed mostly by glass with a standing room aft. This very popular form is still much used, and answers a widely sought demand for day sailing or short cruising; the boats are usually about 45 to 70 ft. long, and from 8 to 10 ft. wide. This style of small yacht had no deck room that was available for real use, but the standing room with an awning over it with adjacent cabin made a very serviceable craft, in which cruising could be done from May until October on our coast with perfect safety. In those days 8 miles an hour was thought fast enough for anybody, but in a few years, when the engine and boiler were both more perfected, more speed was demanded, so that the type in question attained to 12 or 13 miles an hour, which in some cases has been pushed to 15, whilst the speed of the open launch which at first was but 8 to 10 miles an hour, reached, under the stimulus of popular desire and better motive power, to 16 and even 20 miles an hour in quiet smooth water.