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256 g^ftturtevant Co.,g°flssTs0N' MANUFACTURERS OF THESTURTEyHNT BLOWERS EXHAUST FANS, ENGINES, HOT BLAST HEATING and PORTABLE FORGES, STEAM FANS, VENTILATING APPARATUS. BRANCH STORKS: 34 Oliver Street, Boston, Mass. 75 Queen Victoria Street, London, K.C., Eur. 91 Liberty Street. New York, N.Y. 21 West Nil© Street, Glasgow, Scotland. 135 North Third Street. Philadelphia, Pa. 38 Wilhelmstras.se, Berlin, Germany. 16 So. Canal Street, Chicago, 111. 2 Kungsholmstorg, Stockholm, Sweden. SCHAFFER & BDDENBERG, SOLE MANUFACTURERS OF -STEHM-VYRENS This Syren is specially constructed for use on board steamships, and will be round to possess advantages greatly superior to any other steam sounding or signaling apparatus. The following among other advantages will be readily understood and appreciated: 1 This Syren gives the most intense, far-reaching and distinctive sound yet obtained. 2. For its intense and distinctive sound it is not dependent on tlie shape, quality or vibrations of the metal from which the apparatus is constructed, and It cannot be over-blown, even with the highest pressures, as is the ease with Bell or Organ-Pipe Steam Whistles. 3. With the Fixed Cowl the sound is projected in a horizontal direction ; the Syren may be fitted to look forward, so that the most concentrated sound will be projected in the direction of the steamer's course. 4. With the Movable Cowl the Syren becomes in acoustics what the electrical search-light is in optics, as the sound may be projected horizontally In any required direction. •". The position of other ships, land, breakers, etc., can be determined with great accuracy by moving the cowl round the horizon, and blowing quick, sharp blasts, then noting the time and direction from which the echoes are heard, when any obj ect disturbing the level of the ocean or lake will be detected, and its distance may be calculated. We also make the IMPROVED THOMPSON STEAM ENGINE INDICATOR, STROKE REDUCTORS, PLANIMETERS, ENGINE REGISTERS, and PRESSUREi'GHUGES FOR ALL PURPOSES. Works and General Offices, Brooklyn, New York. salesrooms: No.22w. lakes 66 John St. Write for Catalogue. AGO.