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fg fie DEVOTED TO EVERYTHING AND EVERY INTEREST CONNECTED OR_ ASSO- CIATED WITH MARINE MATTERS ON THE FACE OF THE EARTH. Published monthly by The Penton Publishing Co. CLEVELAND. BUPPALO 3. 6205s ss 932 Ellicott Square. GHIGAGOR Teck 1328 Monadnock Blk. CINCINNATI..... First National Bank Bldg. NEW YORK... 02... 1005 West Street Bldg. PITTSBURG... o..% sie artes 510 . Park Bldg. SEATRIEE 3... ee ou... 302 Pioneer Bldg. Correspondence on Marine Engineering, Ship Building and Shipping Subjects Solicited. Subscription, U. S. and Mexico, $1.00 per annum. Canada, $1.50. Foreign, $2.00. Single copies, U. S. and Mexico, 10 cents. Elsewhere, 15 cents. Back numbers over 'three months, 25 cents. Change of advertising copy must reach this office on or before the first o : each month. ' ~The Cleveland News Co. will supply the trade with the Marine Review through the regular channels of the American News Co. European Agents, The International News Company, Breams Building, Chancery Lane, London, E. C., England. Entered at the Post Office at Cleveland, Ohio, as Second Class Matter. July, (1909. FIRST SUMMER MEETING OF THE NAVAL ARCHITECTS AND MARINE ENGINEERS. The Society of Naval Architects and Marine Engineers is to be congratu- lated upon the success of their first summer meeting held at Detroit on June 24, 25 and 26, as to which all The presented for anticipations were fully realized. quality of the papers discussion order and was.of. a. high it is to be regretted that a larger number were not present to take part in the The paper "Some Model Experiments on Suction pi. Vessela by Me. D..W. Taylor, gives results of observations of tow- discussion. on ing models in various positions relat- ive to each other and is noteworthy as the first serious attempt at research on what has serious and perplexing problem. That Mr. Taylor's deductions are valuable goes without always been a saying--anything bearing his name is always of value, but since THE MARINE KEVIEW the most serious cause of disturbance-- the propeller--was absent, the premises are imperfect. Mr. Taylor is inclined to think that propeller action is of small importance, whereas the those familiar with handling ships, is So pronounced everyday experience of directly the opposite. is it in fact, that a ship lying along- side a canal bank or another vessel is very often got clear with difficulty. The effects of suction caused by the propeller are to be observed even with- out any headway. Let two ships lie abreast, some little distance apart, and let the propeller of one be set in mo- . tion and the two vessels, if free to move, will inevitably be drawn _ to- gether. Propeller suction is part and parcel ob- served in shoal water, as may be shown also of the increased _ resistance by the fact that a hull of a given dis- placement may be towed at a given speed through a_ contracted ~channel without appreciable disturbance of water level, but a steamer of the same size can not be driven at a. corres- ponding disturbance speed without more or less violent, depending upon speed, size and power of vessel. Mr. Taylor's deductions are applicable only to towed vessels and in deep water, conditions seldom or never existing where suction phenomena are most ap- parent, yet they are of value as a be- ginning and. as furnishing data which is necessary in subsequent investiga- tions. She: paper by Prof.' C. H. Peabody on "A Method of Determining Pres- sures for Steam Turbines," goes into a subject which is of interest chiefly to turbine designers and classes in ad- vanced engineering. . Prof, Peabody is a prolific author and on questions in- volving discussion of the properties of steam, is a recognized authority. Prof. Sadler's panes ean "The. Resist- ance of Some Full Types of Vessels," is another of those contributions grow- ing out of the experiments at the ex- perimental tank at the University of Michigan, the for which has come to look with anticipation and is society never disappointed. The experiments bring out most clearly the effect of relatively small July, 1909 modifications of a type of ship which -- was not supposed to be susceptible of any radical improvement, thereby ere. of the tank to and owners. In phasizing the value both builders the in power some stated that the affected by the suggested modifications amounted to 25 instances author reduction per Cent: = Incidentally, the curves illustrate forcibly the effect of shallow water on resistance and as was pointed out by a member, goes a long way in ex- We hope to have further communications planation of suction phenomena. from Prof. Sadler on his shoal water experiments as intimated in his paper. The paper by Commander W. P. White, U. S. N, on "The U. SS. Michigan, Renamed the Wolverine," - is supplementary to the paper same subject by Mr. H. Penton, read on the at the November meeting. Commander White, who is in command of the old vessel, is as proud of her as though she were the new Michigan and has evidently taken a keen pleasure in col- the his paper. information contained in He added that during his examinations he found evidence of pit- lecting ting scarcely anywhere, a condition it is perfectly safe to say he would hardly have found had she been built of steel, even with the best of care. It is interesting to consider what would old she ever came within the "sphere of influence" of a modern navy yard. There would certainly be little of her left, and the happen to this ship if fact that no navy yard exists on the great lakes, is probably the chief rea- son why she is still spared to us. "Mr. Charles Ward's paper on "Shal- low Draft River it deserved, well received. Steamers" was, as It contains which The almost sui a vast amount of information hitherto inaccessible. been Western generis and probably very little of the has river steamer is data concerning the type has ever been Mr. valuable which makes the form, all call in recorded Ward's and paper more serves. to attention to the labor involved in its preparation. The reasons for many apparent anomalies in their construction are made plain and the continued exist- ence of others in the face of well