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"TAE. MarRINE. REVIEW use, is the automatic.-alarm of the Montauk Fire Detecting Wire Co., of New York. This appliance consists of a tube thermostat made to operate at three specified temperatures, viz.: 160, 200 and 300 degrees Fahr., and having the porcelain base colored white, red or green, according to the operating point of the enclosed wire. This thermostat consists of a copper conductor coated first with a fusible alloy; second, with a concentric insu- lation; and third, with a concentric conductor. The core conductor is connected in series with a battery, an annunciating instrument and the con- centric conductor, this forming a cir- cuit which is open as long as the con- centric insulation is intact. The effect of exposure to heat higher than the critical temperature of the alloy is to cause it to fuse, and, in fusing, to ex- pand. This expansion results in num- erous radial lines of alloy being forced through the surrounding insulation. As the insulation contains a fluxing com- pound, the alloy unites in a soldered connection with the concentric con- ductor, perfectly closing the circuit at many points. - In the tube thermostat the second conductor consists of a copper tube ' which, with the insulated core con- ductor, is placed in the porcelain re- ceptacle or base already mentioned. Within this base the core wire is per- manently connected with one binding post, and the tube connected with the other. Such thermostats connected up by common wire with a battery and an annunciating instrument form a circuit complete except for the insu- lation between each core wire and its tube. Consequently, the' puncture of this insulation, in any of a number of thermostats in multiple, closes the cir- cuit. : These thermostats are wired in mul- tiple and are enclosed in: steel outlet boxes with covers where installed in cargo spaces or other portions of a vessel where they are subject to rough treatment. All wires for thermostats are carried in iron conduit, the ther- mostats throughout the cargo holds being arranged to connect to a special fire alarm watertight type of annun- ciator located in the main engine room. The Carnegie Institution at Wash- ington has awarded contract to the Tebo Yacht Basin Co., of Brooklyn, N. Y., for the construction of a vessel for the Magnetic Survey Service to be called Carnegie. She is to be con- structed throughout of non-magnetic metals. INBOARD PROFILE AND DECK PLAN OF THE WHITE STAR LINE. STEAMER WAUKETA.