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1900] MARINE REVIEW. 21 NAVY PROJECTOR, The Rushmore Dynamo Works of Jersey City, N. J., is furnishing over 100 projectors for the various ship builders on the coast, including nearly fifty of the navy type for the new war vessels under construc- tion. A number of them have also been installed on many of the finest lake vessels. The firm is now shipping a fine 18-inch yacht projector to Fletcher Bros., Alpena, Mich., for the yacht Dungeness; also an 18-inch spe- cial pilot-house projector for the new passenger steamer Tashmoo, building | at Detroit, and three others for steam- mM ers building by the Detroit Ship Build- ing Co., as well as two 14-inch pilot- house projectors for the Arnold steam- ers at Cheboygan, Mich. The illustration herewith shows one of the new Rushmore 18-inch 85-am- pere navy standard projectors, being built for the torpedo boat destroyers and other vessels. These projectors are equipped with extremely efficient parabolic lenses, for the making of which the. company has a most com- plete lens. plant. The lenses are of uniform thickness and are thus very much lighter than the Mangin type. The cylinder of the light is fitted with sliding bearings, so that it may be readily. balanced as required by the navy when used with the heavier Man- gin lens. .Each projector is supplied with a front door fitted with plain glass strips, and also an extra front door fitted with the navy standard diverging lens strips, which are also made in large quantities at the works. The lamp movement is the latest Rushmore positive feed type, and ‘will feed the carbons both toward and away from each other, as required to keep the arc absolutely constant at 50 volts, the variation under the most extreme conditions being less than one volt. In all other lamps heretofore used in the navy the carbons are separated a definite amount by a series mag- net, and as they are consumed are fed together by a separate shunt mag- net. Should the wind or a defect in the carbons cause a displacement of the arc, the old lamps always overfeed and the lamp goes out until the carbons are separated ‘by hand. This defect may lead to disaster in time of war, especially in the case of distant-control projectors. By pressing a small hand wheel into engagement, the automatic feed is thrown out of action and the lamp may ‘be fed by hand, or the hand feed may be used in connection with the automatic feed. The cylinder is fitted with two dark glass peep sights, one in the side for observing the arc in horizontal plane and the other in the side of the top ventilator in connection with a prism for observing the arc in vertical plane. The turntable is mounted on roller bearings and moves very easily. ‘There is provided a hand wheel for slow control vertical movement and another for slow horizontal control, these devices being readily locked in any po- sition or instantly thrown out of engagement. There is a water-tight double-pole switch in the base. There is furnished a navy standard regu- lating rheostat for working on the 80-volt circuit with which the current may be varied from 20 to 35 amperes. NEW PROCESS OF TREATING TOOL STEEL. Mr. H. F. J. Porter of the Bethlehem Steel Co., who is known to readers of the Review through his very interesting and instructive papers on steel forgings, was in ‘Cleveland a few days ago. Mr. Porter is in the west at present in the interest of a new process of treating tool steels. which has recently been discovered at the Bethlehem works. This new process, which is known as the Taylor-White process, has developed some marvelous results, and it seems likely that its introduction into common use will revolutionize the machine shops of the world. It seems almost incredulous that a steel may be treated so that it will be harder when it is red hot than when it is cold, but according to Mr. Porter, this is a fact, and being the case, has allowed of the speeding up of the ma- chine tools in the Bethlehem shops to four and five times their former capacity. The Bethlehem Co. intends informing the world of this discovery at the Paris exposition, and they are now preparing an exhibit for that purpose. The introduction of the process in this section will be in the hands of Mr. Walter Miller, who has represented the Bethlehem Co. for several years, Sealed proposals will be received at the of- fice of the Light-House Engineer, Detroit, Mich., until 12 o’clock M., May 18, 1900, and then opened, for furnishing the materials and labor of all kinds necessary for the complete construction of the wharf, oil house, buoy shed, custodian’s dwelling, barn, boat-house, fences and walks, and to do all necessary grading, for the light-house and buoy depot on Sugar Island, St. Mary’s River, Mich., in accordance with specifications, copies of which, with blank proposals and other infor- mation, may be had upon application to Thos. H. Handbury, Major, Corps of Engineers, U. S. A. May 10. BELLEVILLE GENERATORS. GRAND PRIZE AT THE WORLD'S FAIR OF 1889. | List of Ocean Steamships on Board which BELLEVILLE GENERATORS are Used. FRENCH NAVY. Despatch Boat VOLTIGEUR; Squadron’s Look-out pulp MILAN; Squad- ron’s Look-out Ship HIRONDELLE; Gunboat CROCODILE; Despatch Boat ACTIF; Cruiser AMIRAL RIGAULT DE GENOUILLY; Iron Clad Cruiser ALGER; Iron Clad Cruiser LATOUCHE-TREVILLE; Iron Clad Cruiser CHANZY; Iron Clad Cruiser AMIRAL CHARNER; Tug ABERVRAC’H; Despatch Boat CAU- DAN; Torpedo Despatch Boat LEGER; Torpedo Despatch Boat LEVRIER; Battleship BRENNUS; Protected Coast Guard AMIRAL TREHOUART; Iron Clad Cruiser BRUIX; Iron Clad Cruiser BUGEAUD; Cruiser DESCARTES; Battleship BOUVET; Cruiser POTHUAU; Cruiser GALILEE; Cruiser PASCAL; Cruiser CATINAT; Battleship CHARLEMAGNE; Cruiser LAVOISIER; Cruiser PROTET; Battleships GAULOIS, SAINT LOUIS and HOCHE; Iron Clad JENA; Cruiser DESAIX; Iron Clad Cruiser DUPETIT-THOUARS; Cruiser DUPLEIX; Cruiser FURIEUX; Battleship NEPTUNE; Battleship DEVASTATION; Cruisers SULLY, AMIRAL AUBE and MARSEILLAISE. MESSAGERIES MARITIMES: Cargo Steamer ORTEGAL; Mail Steam- ships SINDH, AUSTRALIEN, POLYNESIEN, ARMAND-BEHIC, VILLE-DE-LA- CIOTAT, ERNEST-SIMONS, CHILI, CORDILLERE, LAOS, INDUS, TONKIN, ANNAM, ATLANTIQUE. : COMPAGNIE DES CHEMINS DE FER DE L’OUEST, (Plying between Dieppe and Newhaven): Freight Steamers ANGERS, CAEN, BREST, CHER- BOURG; Fast Steamers TAMISE, MANCHE, FRANCE. RUSSIAN NAVY. Iron Clad Frigate MININE; Gunboat GROZIASTCHY; Imperial Yacht MAREVO; Imperial Yacht STRELA; Gunboat GREMIASCHY; Gunboat OTVAJNI; Imperial Yacht TZAREWNA; Imperial Yacht STANDARD; Cruiser ROSSYA; School Ship VERNY; Cruiser SVETLANA; Cruiser DIANA; Cruiser PULLADA; Torpedo Transport Boat BAKAN; KHERSON and MOSKBA, Ships of the Volunteer Fleet; Gunboat GILACH; Iron Clad EKATERINA II; Gunboat KOUBANETZ; Cruiser AURORA; Iron Clad EMPEREUR NICOLAS I; Iron Clad PRINCE POTIEMKINE DE TAURIDE; Cruiser BAYAN; Iron Clad CESARE- WITCH: Gunboats TERETZ and QURALETZ; Iron Clad BORODINOW; SMOLENSK, Ship of the Russian volunteer fleet; cruiser BOJARINE. E ENGLISH NAVY. Torpedo Boat Destroyer SHARPSHOOTER; POWERFUL and TERRIBLE, iron olen, cruisers; GLADIATOR, ARROGANT, FURIOUS, VINDICTIVE, cruis- ers; NIOBE, DIADEM, ANDROMEDA, EUROPA, cruisers; CANOPUS, GLORY, GOLIATH, ALBION, OCEAN, iron clad ships; ARGONAUT, ARIADNE, AMPHI- TRITE SPARTIATE, HERMES, HIGHFLYER and HYACINTH, cruisers ; VENGEANCE, iron clad; ALBERT AND VICTORIA, royal yacht; CONDOR Cable Address: BELLEVILLE SAINT-DENIS-SUR-SEINE. and ROSARIO, sloops; CRESSY, ABOUKIR, SUTLEY and HOGUE, cruisers; IMPLACABLE, FORMIDABLE and IRRESISTIBLE, VENERABLE, LONDON, BULWARK, iron clad ships; EURYALUS, BACHANTE, cruisers; MUTINE, RINALDO, SHEARWATER, sloops; CORNWALLIS, DUNCAN, EXMOUTH, RUSSEL, iron clad ships; DRAKE, KING ALFRED, LEVIATHAN, AFRICA, cruisers; VESTAL, sloop; MONMOUTH, cruiser; BEDFORD, cruiser; ESSEX, KENT, cruisers; ALBEMARLE, MONTAGUE, battleships. The total horse power of boilers fitted on board the 57 above named ships of the British navy is nearly 900,000. AUSTRIAN NAVY. BUDA-PEST, iron clad coast guard; KAISER KARL VI, cruiser; X’, x”, battleships. ITALIAN NAVY. VARESE, cruiser; BENEDETTO BRIN, battleship. ARGENTINE REPUBLIC. PUEYRREDON, cruiser; Steamships PUERTO-HUERGO and MENDOZA. SPANISH NAVY. REINA REGENTE, cruiser. CHILIAN NAVY. O’HIGGINS, cruiser; ALMIRATE LYNCH, torpedo boat destroyer; ALMIRANTE CONDELL, torpedo boat destroyer; GENERAL, BAQUEDANO, school ship. JAPANESE NAVY. SHIKISHIMA, iron clad; CHIYODA, cruiser; ASAHI, iron clad; IWATE, cruiser; AZUMA, cruiser; HATSUSE, iron clad; ITSUKUSHIMA, iron clad coast guard; MIKASA, battleship. UNITED STATES OF AMERICA. Northern Steamship Co.’s Passenger Steamers NORTH WEST and NORTH LAND, of 7,000 H. P. each; yachts SHEARWATER, CORYELL, WILD DUCK, SULTANA. General Information Sent on Demand.