The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

April, 1909 THE Marine Review the curves of bending moments, etc., and equivalent girder, for the latest New York harbor dredges Raritan and Navesink. It will be noticed that the neutral axis of girder is very low, showing that the material is not dis- tributed to the best advantage. The bending moment for hogging ; EXD works out ------ and tthe stresses: ee 47.34 Tension in sheer strake, 4.22 tons. Compression in keel, 2.73 tons. On the two dredges Ancon and Cule- bra, built for the Isthmian canal com- mission, we located sights and mea- sured the deflection under load. On loading for the first time, a deflection of 5-16in. in 200 ft. was recorded. This returned to within 1-l6in. of original marks when the load was dumped, which would indicate that the structure is amply stiff. On these dredges we also conducted inclining experiment, memoranda of which is given below: Draught-forward, 10 ft. 4 in. Dtaught ait, 11 it.-9 4: Displacement, 2,375 tons. Conditions : Bilges, dry. Water tanks, full. Boilers, full. Workmen on board, 30. Bunkers, half full. Hopper gates, open. ee - GM. 7,187, as inclined. ip a dtans. B. Mo = 20.4 ft: atau. CBS 5.58, 25.93 7.19 ponew 4 Ovurzoarp Prorite or U. S. Drepce GALVESTON. 18.74 == © Ge above [ base. Loaded: Hull 2,375 tons. Load 3,085 tons (at 128 lbs. per cu. ft.) Corrected C. of G., 18.14 ft. Met. above base = 208 C. G. above base = 18.14 266=t GM. [loaded. x _ The percentage dredged depends on : oun the quality of material, and ranges sep Goel Ne ae _ from 10 to 60 per cent. The dredges start out. at 5 A. M. Monday, summer and winter, and do not return to dock until, noon on Saturday. : Manhattan and Atlantic. worked hours per day from June 1, $907; ) Feb. 1, 1908, and only averaged 40 sper month lost time for repairs, the: and coaling. -- 6 the 'record of Raritan for > previous to July 31: - of loads, 44. --