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1903-] MARINE REVIEW AND MARINE RECORD; sf 19 ing and lowering of the piles is, like all the other operations' of the dredger, controlled by a single attendant, all the necessary switches being grouped in the cabin shown at the stern of the boat. The chain of buckets is driven by a three-phase motor of 5 H. P., which, however, is capable at a pinch of developing as much as 70 H. P. It is, like the motor working the pile gear and the ladder crane, designed to run at 600 revolutions per minute, the necessary reduction in speed being effected by gearing. The operations of starting and stopping can be effected with great ra- pidity and the speed when running is perfectly constant. The torque exerted varies greatly as the buckets pass over the tumbler. Running empty the current taken as the bucket rises over the latter corresponds to 20 H. P., whilst when the summit is passed the current falls to zero. With a full bucket the ordinary.maximum effort corresponds to about 30 H. P., so that the average demand may be taken as 15 H. P. only, thus leaving a very large reserve of power. Should, however, the resistance met with exceed the maximum power available; the fuse on the motor circuit blows, thus saving the apparatus from damage. The replacement of this fuse is, of course, only a matter ofa few min- utes. : The generators selected by Mr. Varilla deliver to the mains a triphase alternating current at 2,000 volts. This is transformed on reaching the dredger to a 200-volt current, with which the dif- ferent motors are designed to work. These are seven in num- ber, two being employed for driving the screws, one for lifting the ladder, one for driving the chain, two for the pile gear, and one for a centrifugal pump, the discharge from which is used for washing the ballast free from sand. PHILADELPHIA SHIPPING NEWS. Philadelphia, Oct. 21.--The annual meeting of the New York Ship Building Co. was held last week in Camden and the follow- ing officers were re-elected: President, De Courcey May; vice- president and general_manager, Charles S. Hall; secretary and treasurer, Samuel L. Knox; superintending captain, William G. Randle; directors, De Courcey May, Charles S. Hall, William G. Randle, Henry Walters, Myron C. Wick, Michael Jenkins, A. W. Mellen. The report of President May reviewed the work of the year and stated that the company's business is in a healthy con- dition. A large number of contracts are on hand, the report stated, sufficient to insure employment to a full force of work- men for some time. The report was received with satisfaction by the directors. At present writing it is likely that the 625-ft. steamship Manchuria, being constructed for the Pacific Mail Steamship Co., will be launched Oct. 31. Capt. William G. Ran- dle left the yards Monday morning in charge of the fire tug Abram S. Hewitt, which he will take to New York and turn over to the fire department of that city. - Pee The cruiser Denver left the Neafie & Levy ship yard last Thursday to proceed to Boston, where she will prepare for her trial trip next Thursday. The Denver is in charge of Capt. Chase, who commands the large steam yacht Josephine. - The trial course is in a direct line between Cape Ann and Cape Por- poise, Mass. The Denver is a protected cruiser of the 3,100-ton class and must come up to a speed of 16.5 knots. She has twin, screws and is of 4,700 H. P. In about three weeks most of the office force of the Inter- national Mercantile Marine Co. will be transferred from this city to.New York. The Philadelphia office will also be moved from its present location on Walnut street, near Third, to the annex , to the Land Title building, Broad and Sansom streets. Clement A. Griscom, president, and his assistants will have quarters on the seventeenth floor. Rodman E. Griscom, manager of the com- pany, will remain in this city. It has not been decided as yet whether Secretary Emerson E. Parvin and Treasurer James S. Swartz will remain in this city or go to New York, but most likely the latter. In shipping circles the significance of the trans- fer is thought to be that J. Pierpont Morgan wants the main office of the company at 71 Broadway, New York, to be the American headquarters of the concern. The directors have met in New York and the vice-president's office is in that city. Under the new plan President Griscom will spend much more time at the New York office than has been his custom heretofore, and the bulk of the company's business will be transacted in that city. Officials of the company are reticent concerning the details of the change. The officers of the company are: Clement A. Griscom, president; P. A. Franklin, vice-president ; Emerson E. Parvin, secretary; James S. Swartz, treasurer; directors, Clement A. Gris- com, P. A. B. Widener, B. N. Baker, John S. Waterbury, Edward J. Berwind, George W. Hawkins, James H. Hyde and Charles Steele. Sir Clinton E. Dawkins is chairman of the British com- mittee composed of W. J. Pirie, J. Bruce Ismay, Henry Wilding and Charles F. Lorrey of London. The entire dredging plant owned by the government at Hell Gate will be brought to this port this week to be put in shape to begin the work of removing Schooner ledge. Capt. Sanford, United States engineer in charge of the work, says that owing to the lateness of the season and the time required to put the dredging plant in shape, work will not start until early spring. In compliance with the unanimous demand for a 35-ft. channel in the Delaware, Capt. Sanford said Schooner ledge would be removed to a depth of 35 ft. That the government intends to own a permanent dredging plant on the Delaware 1s shown by the pur- chase last week from the T. A. Gillespie Co. of New York of the hydraulic pump dredge Uncle Sam at a cost of $15,000. This in- Cludes the cost of fitting the new scow on which the pump 1s Set with new. boilers. Capt. Sanford left Philadelphia for San Francisco Saturday night to inspect the operation of the con- verted suction dredge Grant. He will be gone several weeks. In line with the disposition of commercial bodies all over the country to encourage the enactment by congress of some meas- ure of assistance for our foreign-trade shipping, the executive council of the Philadelphia board of trade on Monday adopted a resolution expressing the "hope that through the careful con- sideration of all issues involved there may be developed, by our national legislative and executive departments, a wise and effi- cient plan for the creation of a suitable American merchant ma- rine,, built, owned, officered and, as far as may be, manned by American citizens." The executives empowered the committee on foreign and coastwise commerce, which has such matters. di- rectly in hand, to take such steps as may be deemed wise and necessary in pleading with congress to adopt a shipping measure. The committee on foreign commerce had already put the matter up to the executive council in a report strongly favoring govern- ment assistance for shipping, and the earnest support of this strong trade organization may therefore be expected in the gen- eral movement. : Capt. W. S. Samuels has announced his candidacy for. the place of director of the Maritime Exchange, recently made va- cant by the resignation of George E. Earnshaw. Capt. Samuels is a surveyor here for Lloyd's. His father was skipper of the old clipper Dreadnaught, which plied between New York and Liver- pool in the early '50s. The next regular meeting of the exchange will be held Oct. 26, and as the captain has the almost unanimous endorsement of members, it is likely he will be elected, The passenger and freight steamer Mary Vinyard was launched at Milford, Del., last Saturday by William Vinyard, her owner and builder. 'The vessel-is 112 ft. long, 24 ft. beam and 7% ft. depth of hold. She will be propelled by engines of 300 H. P., and when completed will run between Philadelphia and Milton. : _ The barge Saxon, with a carrying capacity of 400,000 ft. of lumber, has been purchased by the Export Lumber Co. and she will be towed by the steamer Aragon between this port and Georgetown, S. C. NAVAL ARCHITECTS AND MARINE ENGINEERS. Secretary W. L. Capps announces that the eleventh general meeting of the Society of Naval Architects and Marine Engineers - will be held in New York Thursday and Friday, Nov. 19 and 20. Through the courtesy of the American Society of Mechanical En- gineers, the meeting will again be held in the auditorium of No. 12 West Thirty-first street. Members intending to propose candi- dates for membership can secure blank forms of application by addressing the secretary. The applications should be returned to the secretary on or before Nov. 17. The banquet will take place at Delmonico's at 7 p. m. Friday, Nov. 20. The list of pa- pers to be read at the meeting follows: 1. "Progressive Trial of Ferry Boat Bremen," by Col. Edwin A. Stevens, vice-president. i. 2. "The Isthmian Canal," by Civil Engineer A. G. Menocal, U.S. N. (retired). or "Notes on the Arrangement and Construction of Steam -- Pipes and Their Connections," by R. C. Monteagle, member. 4. "Gasoline Engines for Marine Propulsion," by D. H. Cox, member. ; 5. "Some Thoughts on the Design of Modern Steam Yachts," by Clinton H. Crane, associate. 6. "Watertight Subdivision of Warships," by Commander Wm. Hovgaard, royal Danish navy, member. | 7. "Non-corrosive Nickel Steel Boiler Tubes," by Albert Ladd Colby, Esq. Pale 8. "Curves of Form of the Initial Condition," by George C. Cook, member. CX 9. "The Metric System in Relation to the Ship Building Industry of the United States," by Naval Constructor J. H. Lin- nard; U.S: N; eo 10. "Electricity in Manufacturing Plants," by W. M. McFar- land, member of council. oa 11. "Description of the Design and Building of the 21,000- ton Steamships Minnesota and Dakota," by Charles R. Hanscom, member. | +a 12. "Ships' Forms Derived by Formule,' by Naval Con- structor D. W. Taylor, U.S. N., member of council. 13. "Some Notes on the Performance of the Torpedo Ves- se's of the United States Navy at Sea," by Lieut. L. H. Chandler, aoe N. 14. "Notes on the Launching of the Cruiser Chattanooga," by M. S. Chace, member. ' 15. "Notes on Side Launchings," by Assistant Naval Con- structor W. G. Groesbeck, U. S. N. 16. "Launching of Large Merchant Vessels," by W. A. Fairburn, member. ' 17. "Displacement and Stability Calculations,' by Professor W. S. Leland, member. 18. "Graphic Calculations of a Ship's Stability," by Profes- sor M. H. Bauer, member. It is understood that the Great Northern Steamship Co. will build a huge sea wall at Smith's Cove, Wash., to protect the company wharves. It will be built of concrete and stone.