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MARINE REVIEW. 9 Report of Experimental Trip, dike: UPON SCREW STEAMER E. P. WILBUR TO THE BUILDERS, THE GLOBE IRON WORKS COMPANY, CLEVELAND, O, [BY GEO. C. SHEPARD.] To get components of Table IV, used a combination of Tables I and II in such a manner that from Table I, I got revolutions minute and speed in miles per hour for a certain hour, and tom Table II, indicated horse power from diagrams taken dur- ing that hour. Generally the diagrams showed more revolutions pér minute than the revolution counter and to get indicated horse Rabie: corresponding to revolutions per minute as shown in bles I and IV, determined indicated horse power per revolu- tions from diagrams, plotted curve of results and from this curve computed indicated horse power for revolutions in Table IV. This is the basis of all computations to make the table. The values of the several elements in relation to speed of vessel are plotted on Plate VIII. The speed in miles per hour is the abcisse to the other elements ordinates. The points shown are numbered according to number of. column in table, and in drawing the curves assumed two or three speeds to be correct and drew the curves to the points of those speeds. TABLE Iv. Indicated Thrust and Coefficient. | mS Sater J . o * | aes q Bee | me : | \ =} | oo & Hd ee S| 8 | Bee SE LS el. aire Be ee he) S65 | BE | Se _ Flas Hla we 1 oO es SA ES 3 = : Sed ‘ ee a 2 OO. SPH oe =| ee Oe Seo 2 go = oF = = 4 x ise] z A i==| : RI a ao Bno Sa oo Sv] oS|. eat so n q ame ak aH BX [4 aad Boe ee ee eT aa) ae a | =" ene Loe pay ~ = = | . 4 10 |. 79.1 1 .04 133 | 16.3 1290 29,9) _ 885.6 759.5 ‘TY = 80.5 14.33 129.) 17.23 1387 30,870 390.2 768.5 B | 76.6 13.46 141 14.4 1103. 26,410 | 397.4 782.8 14 | 76.8 14,15 099. | 14.57 1119. 26,715 | 455. 896.3 19 OLY: 15.54 070 =). “17.93 1464.8 | 32,873 461. 908.9 20 =~ (80.4 14.97 089 | 17.15 1378.8 | 31,445 437. 861. 37 72. 12.66 -140 14.25 |, 1026. 26,120 523. 1192 ee ee alee fe 12.66 128 13.65 969. 25,016 554. 1268 43 77. 13.81 123 17.08 1315. 31,304 529 1208, pT pee eae 13. 120: 14.80 . | 1084, 27,219 536 1221 47 77.7 13.92 124 17.42 1353. 31,918 527 1175. 51 76.5 13.46 139 | 16.80 1285. 30,790 490. 1120. 52 76.6 13.58 132 16.88 | 1293. 30,940 | 512. 1168. [ro BE CONTINUED.| CHICAGO LAKE INTERESTS. WESTERN OFFICE, MARINE REVIEW, t No. 210 So. Water Street, CHICAGO, IIl., Dec. 17. The state of Illinois is represented at the waterways convention in Detroit by Ex-Congressman Ralph Plumb of Streator, D. S. Berry of Savannah, Capt. J.S. Dunham, Hon. Homer J. Carr, Capt A. W. Allyn and L. E. Cooley of Chicago and the Chicago board of trade by Jesse Spalding and Hugh MacMillan. The feeling among Chicago delegates is that the convention ought to ask Congress for an appropriation to improve Chicago river. During the coming year the drainage board will expend a large amount of money in improving the Chicago river for drainage purposes—that is, to increase the flow of water through the river, in order to dilute sewerage. The drainage board cannot aid navigation except incidentally as may be done for the purposes of drainage. The general government of course, will never make any appropriations to aid Chicago in her drainage project. But the two working together could certainly make a vast improvement in Chicago river. The government appropriations would be used towards increasing the capacity of Chicago river in the aid of navigation. It may be urged in the convention that Chicago river is a purely local affair, but this does not seem to be the case. It is as much a part of the lake marine as St. Clair river or the Sault locks. The grain traffic particularly, which is handled on Chicago fiver, is something in which Chicago is not half so much interested as the producers in the west or consumers in the east. It is certain that the city of Chicago will never spend the money required to put the river here in decent shape for the purposes of navigation. The general government expended large sumis in improving Calumet river, the rival of Chicago river. Every reason which has been urged for the Calu- met river appropriation can with equal force be urged for the improve- ment of Chicago river by the general government. Where one ton of freight is handled on the Calumet, fifty tons are handled on the Chicago river. It may be that the convention will fight shy of this question, but it is certainly one of the most important which will be brought before that body. The honor of making the last sailing for the lower lakes from Chi- cago for the year goes to James Davidson’s steamer City of Berlin. With the weather the way it has been for a week past, a much larger grain trade would have been done, had shippers cared for boats, but they had made their arrangements for the close of navigation, and business is difficult to turn out of established ruts. Had shippers cared for boats at the exist- ing rates of freight and insurance, at least half a million bushels more would have been shipped during December than there was. Around the Lakes. B. B. Inman of Duluth proposes to equip his tugs with fire pumps and contract with the cities of Duluth and Superior for their services when needed. The scheme seems practical. Despatches from Chicago, Thursday, gave information that the Rube Richards had been burned out forward and that the H. A. Tuttle had also been damaged by fire, amount of damage not being stated. A feature of the report of the light-house board that is of special interest to vessel* owners is the recommendation that $8,600 be appropriated for maintaining lights at Bar point, Bal- lard’ sreefand the Lime-Kiln’s crossing, all points near the mouth of the Detroit river, where for years past these aids to navigation have been maintained at private expense. The Detroit Free Press persists in claiming that the steamer: Susquehanna’s engines will be rebuilt during the coming winter, while Buffalo people, who are in a position to know, claim that’ the boat is doing good work and that her engines will not be rebuilt. It is difficult to understand the reason for such a claim in Detroit when no authority is given for it. The Manistee Iron Works Company of Manistee, Mich., has closed two more contracts for marine engines. One is with T. Wilce & Co., of Chicago for new cylinders 15 and 30x20 inches, new motion and independent air pump and condenser, to replace the compound engine now in the barge Hattie Perue. A boiler 74x12 feet, Otis steel, to carry 140 pounds of steam is also being built for this boat. 18 and 34x30 inches, for the barge Philetus Sawyer, to take the place of the two 18x2o0-high pressure engines now in the boat. The engines taken out are offered for sale. Cleveland Matters. The Original Cleveland Tug Men’s Association will give a ball at Germania hall on the evening of the 21st inst. s It is expected that the government steamer Amaranth, light- house construction boat for the Nirith and Eleventh districts, will be launched at the yard of the Cleveland Ship ee Company toward the latter part of the week. The Wilson Tine steamer Wallula was the last boat to arrive at Buffalo, reaching that. port on Monday, the r4th inst., with wheat from Chicago, on which the gross freight was $3,465. The steamers of this line are among the first out in the spring and the last to lay up in the fall.” The machinery for the Cleveland Cliffs Mining Company’s boat, building at the yard of the Chicago Ship Building Com- pany, will be suppled by the Cleveland Ship Building Com- pany.» The engines will be vertical triple expansion with cylinders 15, 25 and 42 inches by 30 inches stroke. The boat will have one Scotch boiler, 13 feet diameter by 11 feet 6 inches in length, to be allowed 160 pounds of steam. Ludlow Manufacturing Company is the name of a corpora- tion organized with a capital stock of $100,000 to take up the business of manufacturing the Ludlow coal bucket, which is be- ing generally adopted in the lake shipping business on account of the saving secured in its use from breakageof coal. The officers are B. D. Babcock, president, W. E. Ludlow, vice-president and general manager, and W. R. Huntington, secretary and treasurer. The office of the company is at 121 Superior street. The buckets are now being made at the works of the McMyler Manufacturing Company and the size in most cases will be increased to four tons capacity, on account of the introduction of. the large McMyler derricks, in connection with which they will be used. “Tt is not an uninteresting thought to consider the exceeding slowness with which at times the mind arrives at full compre- hension of things, which when finally understood lead to almost in- calculable benefits. Take for instance, the spreading of oil upon _ water, to stay even the action of, or the forming of dangerous waves, breakers or combers. The fact that oil would still the waters was known 2,000 years ago, yet only within a very few years has it dawned upon the modern mind to make use of this life and property saving means so easily at our command. Look if you may find some things of great value to you in these pages.’ The foregoing is the introduction to the 1892 catalogue of the American Ship Windlass Company, Providence, R. I. It is handsome enough and valuable enough to pay you for sending your address for a copy, if one has not already been received. The other contract is with F. A. Hagan of Green Bay, to build a new steeple compound engine, cylinders |