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Experiments with Models of Ships. -- Editor Marine Review:--I notice in your columns that the navy department has secured a partial appropriation and has begun at Wash- ington the construction of a tank in which to make experiments with models of ships. This is a most sensible idea and one that was fra Te RR FIG, I offered to the secretary of the navy about 1882, long before the white squadron was thought of. A word or two with reference to tank experiments on a small scale may be of interest at this time, and I send you herewith a rough sketch involving the working value of tests of different lines (wetted surface). is a complete model so far as the body of the ship is concerned. Two methods are used, one the whiffle-tree, and the other the weight per eas Jarl Llacn First, the models are made full, that - g : MARINE REVIEW. Receipts of Coal by Lake at Milwaukee. A statement prepared by Capt. J. F'. Trowell of Milwaukee gives a full account of coal received by the different companies at that point during the past season. The receipts aggregated 1,481,179 net tons, of which 814,246 tons was anthracite and 666,933 tons bituminous, Following is the statement: RECEIPTS OF COAL AT MILWAUKEE BY LAKE, SEASON OF 1896. COAL COMPANTES. pe oa Fee dtal oe ra © Ole aera ssenadcesteapecana at 115,886 208,161 « 324,047 NoGEnwesterit Mitel COnn.c.-...se.sernss 172,085 121,636 293,721 H. M. Benjamin Coal Co..;............+. 107,376 74,397 181,773 Phila. & Reading Coal and Iron Co. 84,676 37,232 121,908 COXERB LOS 6 OU) COneasocnaieniasioscnsccsonceee 79,166 30,458 109,624 Whitnall & Rademaker.................. 89,008 11,209 100, 217 eee roi One) COfemesscaisarermhroeindeHont st 53,931 15) 3929.4 == (693923 ERS Ol eeepc eecue siiccsccciemen sac we cee 7,388 34,616 42,004 pe GhOSS Ce OOUS:s.asrerasyegrec. cs sccepumer 39,486 1,313 40,799 GeovS. Hastmany.c.ncv.cecsdsssusres sews 16,822 12,045 28,867 Ee Collat hace Wid vlG it sccrs; ss eereatececareg E208 Me iil orks se etutezs 12,087 pL emes a iteGca Osea scacteetesecnes 56086 9,074 3,354 12,928 Walkie OLLEL naa ecnecr rena oes eneeteies ST Oh ee lee te ence 8,105 C. F. Haase Coal Co.......ccceccc essere TSN DT ed ead «onda 7,421 Noth Side: Coal Co. rece. «s+ srenses 6665s. |te sconce 6,665 We LO Wiles ac sss csceiedene cesses sraeese calc eetas ercee 2,559 - 2,559 Jno. Ryan Lumber Co..............00000 alee ae eis ae 3,114 es Christensen. .1-s stare soestsreeertres: TOS Oreste ct acee 1,956 Jos: Schlitz Brewiteu Co faccaesstcnsees|(2 oo dedecec. 8,253 8,253 Jupiter Malle cee nect eee eetes enreatess 3,420 3,420 Daisy Rollers Vit ee ca sncehecnsretreceaia lg ep: ceteris 4,882 4,882 lin GIs; Steel COR. sc sci.sasncesr seas seen | eae eeae 43,736 43,730 MilwarkeexGasight- Co" ccctccsecsee| 2 weer ones 53,770 53,770 814,246 666,933 | 1,481,179 SISSON OH? Tele /S\jcansonacsceu cedosadoooponedded 852,078 484,864 1,336,942 Grain shipments out of Milwaukee from Jan. 1 to and including Dec. 19, 1896, aggregated 23,484,148 bushels, divided as follows: -- pound per foot or inch wetted surface. It will be seen at a glance that, | with every thing equal in dimensions, the ship with the most skin friction will pull the hardest. Thus it will be noted in Fig. 1, that this form of vessel pulls hardest on the whiffle-tree, and the model of less friction goes ahead. In Fig. 2 the workings are the same, excepting that the vreight js used. When the weight is used, the model that comes to it with the smaller degree of friction will give the weight slack line quicker and easier than its rival, and must necessarily reach the objective point ahead of its rival. I made tests of this kind years ago in experimenting with racing shells. - Port Huron, Mich., Jan. 4, 1897. J. J. Lynn. "How many war vessels and merchant vessels have you built in your ship yards?" was asked by one of a party of friends of Charles Cramp, at whose great ship yard the new United States warship Ala- bama is being built. "The Alabama will be our 290th ship," was Mr, Cramp's reply. "And," he continued, "that figure '290' is especially noteworthy in this instance, because of an interesting fact and historical coincidence. The rebel cruiser Alabama was for a long while a "nameless ship," and her only designation was by number. The coincidence which strikes me as interesting is that the piratical cruiser Alabama was No. 290, and the United States war ship is No. 290. The rebel ship was the 290th ship built by the Lairds, in England; Uncle Sam's new ship is the 290th new vessel built in our yard at Philadelphia."? Cylinders cf the quadruple expansion engines that are being built _by the Chicago Ship BuildingCo. for the new Wolvin steamer Crescent City, and which are to be supplied with steam at 250 pounds pressure by Babcock & Wilcox water tube boilers, will be 19, 28, 41 and 60 inches diameter with 42 inches common strokes of piston. Wheat 2,494,703 bushels, corn 422,378, oats 12,978,028, barley 6,324,- 342, rye 1,264,697. There are now twenty-one torpedo boats built and building for the United States navy. But this is only a drop in the bucket compared with England's undertakings in this line. The British admiralty is about ready to place more orders for torpedo boat destroyers and this time the number will be twenty, all of which are to be of 33 knots speed. The highest speed expected from any of the torpedo boats building in the United States is 304 knots, from No. 9 and No. 10, build- ing at Bath, which on only 146.4 tons displacement, have +,200 horse power. No. 11, building at San Francisco, is to develop 5,600 horse power, and is by far the largest vessel, displacing 273 tons, while she is expected to make 30 knots. From the boats advancing toward completion at Bristol, R. I., 274 knots is expected, and from the Seattle boat 26 knots. The three newly finished at Baltimore are to make 244 knots, and there are also three 224-knot and four 20-knot boats under construction. Among important business changes in Cleveland is the announce- ment that, owing tothe death of Mr. H. J. Webb, which occurred some time ago, the affairs of the firm of H. J. Webb & Co. have been entirely closed up, and the business of the firm is now in the hands of W. C. Richardson, the junior partner, who is well known to vessel men in, all parts of the lakes, and who has really been the active manager of the concern for more than a year past, owing to the long illness of Mr. Webb. Mr. Richardson not only retains the management of the fleet of vessels that were controlled in the office of H. J. Webb & Co., but will also continue a large vessel brokerage and insurance Bees that was built up by the old firm. The Review has excellent photographs of lake ships.