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MARINE REVIEW. 9 Greatest of the Lake Superior Ore Mines. Machinery now at the big Mountain Iron mine (Rockefeller-- Carnegie property) on the Mesabi range, where iron ore is mined ata cost of about 7 cents a ton, consists of two Marion and two Vulcan steam shovels,one of the latter being a new machine that has not been tried in ore, but is guaranteed to mine 5,000 tons every ten hours. It is one of the finest pieces of machinery on the range. The mine has twenty-three acres of ore stripped for mining, but two of the shovels are steadily at work increasing this stripped area and will probably so continue all summer. The length of the ore body uncovered is a little over one-half mile and the width about 500 feet in the widest part, while the depth of the ore so far cut into the levels for the shovels and tracks is about 60 feet, with the ore extending how much below that nobody but the company knows. It is generally supposed that the ore body is about 1,200 feet in width in the widest parts and that the ore runs down some 100 feet to 150 feet. The present pit repre- sents about 1,000,000 yards of stripping and some 1,250,000 tons of ore has been taken out since the spring of 1893. There are two ore levels on the east side of the mine and one on the west. These levels run parallel, the two on the east side being one above the other, and they are so situated that three trains of twenty-five to thirty cars of ore may be loaded simultaneously, one on each side of the mine from the ears consists of six 15-inch'I-beams, each'36 feet long, and combined they weigh about seven tons. For the hoist there are a pair of 13 by 15- inch engines. A pair of 7 by 9 engines swing the crane, and the hoisting and swing chains are of 1% and 14-inch best quality dredge chain. The dipper has another pair of 7 by 9 engines. The shovel will handle about eighteen tons of material a minute without crowding. Our Young Naval Constructors, As England declines to further extend the courtesies of her insti- tutions for the education of naval architects to American pupils, the graduates of the naval academy must hereafter be educated at home. Lately England has refused to permit the cadets at Glasgow to inspect her leading ship yards or to receive any information whatever of a technical nature. The refusal to grant these courtesies is said to have been due to jealousy at the high stand taken by the Americans over her own men at the various schools, and especially at Greenwich. In | all instances the American lads have taken the highest honors of their class, and in competition, too, with men their seniors by many years. Of perhaps twenty boys sent from the naval academy to these foreign schools, all are now members of the construction corps, save fivé who are dead, and one, Lewis Nixon, who is at the head of a ship building plant at Elizabethport, N. J. Hight cadets are now taking the course | STEEL STEAMER ANDREW CARNEGIE, OWNED BY WILSON TRANSIT CO., CLEVELAND. . Dimensions: Over all, 420 feet; keel, 400 feet; beam, 48 feet; depth, 28 feet. Largest cargo, 182,760 bushels of wheat, equal to 5,482 net tons, on draft of 16 feet 1 inch. upper levels and one on the lower level. It is herein that the mine has a decided avantage over any other open pit property, for the trains can be brought to the mine and moved alongside the shovels and on out without shifting. The railroad track over which the empties are brought in for ore lies to the west side of the mine, and runs par- allel with it its full length. At the extreme north end switches are 'so arranged that cars may be run to either side of the property for loading in the upper levels or to the lower level on the east side. At the south end tracks are laid continuously and loaded cars are trans- ferred without delay to the railroad yards one-half mile below. As soon as one train load of empties is loaded with ore another is brought in back of it, and there is no delay from extra switching or from backing out, and the shovels need not stand idle. The tracks are so laid that ore may be taken out for a distance of half a mile before it is necessary to remoye the cars, and the trains make one circle, coming in from the north empty and going out at the south loaded without any unnecessary moving or delay. By putting one shovel on each of the three levels this mine could easily put out ore for this season to the amount of from 12,000 to 13,000 tons a day or about four times its present output, and still the stripping could be kept ahead of the Shovels in ore. But of course there is no intention of doing any such work. The new ninety-ton shovel is an immense machine. Its frame abroad, five of whom have already been commissioned assistant naval constructors, and three will return home in June and be assigned to the corps. These young men are being educated at Glasgow and at Paris. It is announced from Ottawa that the contract for the fast Atlantic steamship service made with Peterson, Tate & Co. of Newcastle has been practically settled. Canada is to pay an annual subsidy of $500, - 000 for ten years. The British government is to pay $250,000 yearly. The Dominion government has only been waiting for the consent of the imperial authorities, which has now been received. The speed is to be equal to. 500 knots in twenty-four hours. There is to be pro- vision for cold storage, and in every respect the vessels are to be up to the best standard. Four ships will be ready by 1898. The Marine Review has prepared in neat oak frames cards contain- ing the schedule of time required to be run between certain points in the St. Mary's river under the speed limit of seven miles an hour. When hung in a pilot house, distance and time may be readily noted from these cards, as the type is large. They will be sent by express to any address at $1 each,or may be had upon application at 409 Perry- Payne building, Cleveland, for 65 cents each. 4 ; fe