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MARINE REVIFW. Tt Illustrated Patent Record. SELECTED ABSTRACTS OF SPECIFICATIONS OF A MARINE NATURE--FROM LATEST PATENT OFFICE REPORTS. 544,676. Folding Boat. Manfierd U. Loree, Miamisburg, assignor of two-thirds to Eugene A. Ohmer and William D. Huston, Dayton, Ohio. Filed Mar. 12, 1895. Serial No. 541,509. Claim. In a folding boat, the combination with the canvas covering, and the gunwales, of a flooring composed of a plurality of panels, a plurality of detachable ribs extending across the upper sides of said panels over the abutting edges thereof, loops on the upper ends of said ribs, straps inclosed in said loops and adapted to bring the gunwales and ribs in rigid contact, a plurality of detachable stays (0) between the can- vas and the ribs. 544,792. Upright Marine Boiler. William N. Oldman, Buffalo, N. Y. Filed Mar. 23, 1895. Serial No. 542,889. Claim. In a steam boiler, the combination of a substantially vertical central flue tube extending up nearly to the steam chamber and secured to the tube sheet, and extending downward to the fire chamber, a strengthening bolt extending from the top of the boiler down through the central tube to the bottom of the same, means for rigidly securing it to the top of the boiler and bottom of said tube, several circular series of vertical tubes having their upper ends connected to the tube sheet, each 54.4.6 76. FOLDING BOAT. circular series being divided into several sub-serics, each sub-series of tubes being connected at their lower ends to the vertical central tube by means of elbows and horizontal tubes in the same horizontal plane around said central tube, each complete sub-series being thus connected in its own horizontal plane one sub-series above the other, anda series of stay bolts connecting the top of the boiler with the tube sheet. 544,956. Life-Saving Apparatus Robert Bustin, St. John, Canada, as- signor of one-half to Robert Keltie Jones, same place. Filed Apr. 17, 1895. Serial No, 546,123. Claim. Ina life-saving apparatus, the combination with a traveler adapted to carry a life-belt or other support, of a pulley inclosed between the sides and adapted to ride on the shore-line, or hawser, one of the sides having an opening to admit said hawser, and a friction-brake con- sisting of a lever fulcrumed between the sides of the traveler and having a shoe upon one end adapted to compress the hawser against the pulley, the other end of said lever hanging below and in front of said traveler frame. The Baltic-North Sea canal will be lighted by electricity or gas buoys at the locks, and along the line by sixteen-candle-power incandescent lamps on each side, placed about 300 feet apart. About 250 lamps will be connected in series. The placing of so large a number of lamps in series is novel, and the results of the experiment are awaited with interest. FFICE OF LIGHT-HOUSE ENGINEER, 9th District, Detroit, Mich., August 23, 1895. Proposals will be received at this office until 3 p.m. of Wednesday, the 4th day of September, 1895. for the construction of a fog signal house onthe north pier at Sheboygan, Wis. Plans, specifications, forms of proposal, and other in- formation may be had on application to this office. The right is reserved to reject any or all bids, and to waive any defects. M.B.Adams, Major Corps of Engineers, U. 8. A., Light-house Engineer. Aug. 29. S. ENGINEER OFFICE, 34 Congress St. e Detroit Mich., August 7, 1895. Sealec proposals for furnishing all labor, materials and appliances, for (A) removing shoals from west approach, St, Marys Fall's canal; (B) re- moving shoals from east approach, St. Mary's Fall's Ganal; (C) removing shoals off Six Mile Point. Hay Lake; and (D) removing shoal 29, section 4, ship channel, etc., will be received here until 2 p.m., September 6, 1895, and then publicly opened. All information furnished on application O, M. POE, Col., Engrs., nee, _ Sept. 1. A Question of Holes. Editor MARINE REVIEW: I was much interested in your description of the engines of an English-built, side-wheel steamer in your last issue. There are several exceedingly novel features. First comes the method of connecting or disconnecting engines by means of the cylindrical holes keyed on the crank shaft. The locomotive boilers, "closely resembling railway boilers," are also worthy of notice, as is the fact that the " firing holes" come down to the level of the grate bars. I am glad to learn that a locomotive is not essentially a railway device. Also that ' firing holes" at the level of the grate bars are making some headway. It is, however, the holes keyed on the crank shaft that interest me most. I wish more specific information were available regarding them. I would like to know how they are arranged; whether the holes are disposed one inside the other or at intervals. It is to be hoped that due care has been exercised in the fitting of them, because if one of them got loose and got tangled up with the twisting moment, the centrifugal effort due to the center of gravity of the moment of inertia getting out of whack with the radius of gyration would unquestionably destroy the equilibri- um of the other holes and probably cause a failure of the entire system. There is nothing to be dreaded more than a hole which can not be kept where it belongs. Even the fact that the locomotive boilers are of rail- way pattern and have firing holes, and these at the level of the grate bars, would hardly restore order. Perhaps the disk may have a restrain- AVING APPARATUS, 544,7 9 2/ UPRIGHT MARINE BOILER, 44 Kt 36 dh i 'i jh tr | i 12 We | ies NX Ja -£ ] Nee iG 1 J 9s ; a oN eee neal fiz: NEE eee Ue | y Hi t i ing effect, however; it is a new thing and ought to be encouraged. Holes surrounded by a disk can hardly fail to feel more pride of position than those left entirely to the mercy of a key. I wonder if one key suffices for all the holes, or if each one has a key of its own. These things can not be made too clear. Perhaps, after all, these holes are of the same variety as those Tom Dean talks about. Tom, he of the expansive vest front, who says "I am ¢ie condenser man of this country," and who wears (except when he calls on vessel men, when he tucks it out of sight for fear of shocking them,) a miniature champagne bottle on his watch chain, says that down in his country the steamboats, which splash up and down the creeks after a rain, carry cargoes of holes, which are used for a variety of pur- poses, such as bung holes and post holes. Heissure about the bung holes, because he has recognized lots of them. I trust you will endeavor to give us more light on this important point and not leave us, as it were, in a hole. WALKING-BEAM. Conneaut, O., August 28, 1895. SUBSCRIBERS WILL AVOID DANGER OF MISTAKES BY GIVING THE OLD AS WELL AS THE NEW ADDRESS WHEN A CHANGE IS DESIRED. Jeffery's Marine Glue For Paying Seams of Decks and other purposes. L. W. FERDINAND & CO., Boston, Mass. -- ewe = -----.-.------- Send for Circular. D, PROVOOST'S SONS & CO. SAIL MAKERS, 18 to 26 Terrace, BUFFALO, N. Y. Agents for Buffalo and Lakes. Barees "WA7 SEL CSC Parties having barges suitable for coal trade, with draft of 11 to 12 feet, and steamer suitable for towing same, and wishing to negotiate for use of game, will please address M., Box B, MARINE REVIEW. Aug. 22.