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MARINE REVIEW. 11 An Effective Strengthening Arrangement. The steel freight steamer J. H. Wade, owned by the Cleveland Rolling Mill Company and managed by Capt. W. C. Richardson, has recently been strengthened at the ship yard of the Globe Iron Works Company ina mauner that would indicate the determination of her owners to keep their vessel up to the highest possible standard. The Wade was hardly more in need of alterations tending to increase her strength than numer- ous other steel vessels on the lakes, but her manager and owners decided to make her capable of withstanding, for many years, the wear and tear incidental to the ore trade, in which she is engaged. The topsides have been doubled with six plates, each 28'x51'x,','", one plate 20/x517"x.9,/7 and one plate 16'x51"x,°," on each side of the steamer. The sheer strakes have been doubled on both sides by seven plates, each 28'x50'x 54/7 and one plate 14'x50"x%'"'". The new sheer strakes extend down from the top of the gunwale bar and overlap the original topside plates 18 inches and the topside doubling plates 14 inches, thus making an ex- ceptionally strong connection between the gunwale and side of the hull. Another Feature of the Lake Levels Question. Editor MaRINE REVIEW: As the subject of lake water levels is being discussed to a great extent in the newspapers, on account of the fear that Chicago's drainage channel will lower the level of the lakes, I desire to call the attention of your readers to a problem which must claim the at- tention of vessel owners at a not very distant day and that is the effect of dredging at the Lime Kilns crossing, Detroit river. It is a well known fact that the level of the lakes has been constantly lowering for some years, or since this channel (Lime Kilns) was deepened and widened. The statement of the government engineers, that if the cross section remains the same, the discharge of water must be the same, is not in accord with the teachings of science nor universal exper- ience, as may be seen illustrated in the enclosed sketches. Fig. 1 shows the river as it was originally, before any dredging had been done; then friction held back the flow as effectually asadam. In Fig. 2, although the cross section is the same as in Fig. 1, (for the reason that the earth removed fromthe channel is thrown in the shoal water on either side) PRYECT rer JIGHTING TAY JAKE GiANNEL ararere nase ace oe p a » OPE OF LIGHT- House ENGINEER, 11¥ DIST, DATAOT, micn., AVGUST, 1894, To are mnman) Awl Aameal te MEAT TOA ame Srernnen, 1 BLM Dak, AP AewET, IE NEBBISH BbSLAND PROJECT FOR LIGHTING HAY LAKE CHANNEL--LIGHTS INDICATED BY NUMBERS, BEGINNING AT LOWER ENTRANCE TO CHANNEL-- TIME OF COMPLETION OF LIGHTING SYSTEM NOT YET FIXED. The total length of the new doubling is 210 feet on each side and extends from 6 feet forward of the forecastle bulkhead to 3 feet abaft of the en- gine room gangway. Allthe plates have been carefully fitted edge to edge of the original plates and are in perfect metallic contact with the same, as all the old paint was completely scraped off. The sheer and side plate butts are all connected by triple riveted straps of ample dimen- sions for % inch rivets, thus making the strongest possible connection. All the original holes were drilled from + inch to 7% inch, to obtain fair holes anda proper area of riveting, the whole of which is perfectly efficient and tight. The bottom has recently been repaired andis now in first class condition. The hold ceiling has been partly renewed and made good and the hull is newly painted. The work was done under the super- vision of Joseph R. Oldham, as representative of the owners, who says eS arrangement is the best he has ever seen carried into practical effect, an it has made the Wade one of the strongest boats on the lakes. pe Tek a eae i i i in this issue, may be had ists of masters and engineers, as contained in t in dana pamphlet form for 25 cents. Marine Review, 516 Perry-Payne. the flow is accelerated by loss of friction and more water must pass through. It improves, for the time being, the navigation facilities, but does it not at the same time lower the water levels of these great com- mercial highways? It is of the utmost importance that high water should be maintained on these lakes by means of dams, jetties or otherwise, but the government seems to consider only the present and not the future when it permits such works as the Chicago drainage channel and the Lime Kilns to enlarge the outflow of these lakes. The water shed of the lakes can not be enlarged, and as the forests are disappearing gradually, every means should be put forth to maintain these most important water- ways as nature designed them, instead of devising means by which in time their utility will be seriously impaired. Detroit, Mich., April 15, 1895. RICHARD P. Joy, The Nickel Plate road can offer to the Sons of the American Revolu- tion reduced rates to their convention at Boston, Mass., April 30th. Re- member we operate through sleeping cars direct to Boston, 223 Apl30