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a A et Babes iene ie: MARINE REVINW. | 13 To Young Engineers, Wm. D. Edwards of Worcester, Mass., says in a letter to the Re- view: "Will you kindly inform me as to requirements in the matter of obtaining a marine engineer's license, and let me know of what value a technical engineering education is in this regard, taking for example the course in mechanical engineering at Worcester Polytech- nic Institute, which is regarded as one of the first as to standing, in the United States. I expect to graduate from the institute next spring, and wish to know where and in what position the sea experi- ence, if any is required, can best be obtained." For the benefit of this young man, as well as others who may be seeking the information referred to, we quote herewith the section of rules of the United States steamboat inspection service covering his inquiry. A full season on the lakes is regarded as a year of practice: "No person shall receive an original license as engineer or assist- ant engineer, except for special license on small pleasure steamers of ae ae ee eee Geo.CSxeparp Dev : ---------2LD. writing of the licensed engineer or master under whom the applicant has served, said certificate to be filed with the application of the candi- date); and no person shall receive license as above, except for special license, who is not able to determine the weight necessary to be placed upon the lever of a safety valve (the diameter of valve, length of lever, distance from center of valve to fulcrum, weight of lever, and' weight of valve and stem being known) to withstand any given pres- sure of steam in a boiler, or who is not able to figure and determine the strain brought on the braces of a boiler with a given prsesure of steam, the position and distance apart of braces being known, such knowledge to be determined by an examination in writing and the re-- port of examination filed with the application in the office of the local inspectors; and no engineer or assistant engineer now holding a license shall have the grade of the same raised without possessing the above qualifications. And no original license shall be granted any engineer or assistant engineer who can not read and write and does not understand the plain rules of arithmetic." 48 49 DRAWING INDICATING PARTS OF THE MODERN TRIPLE EXPANSION MARINE ENGINE. [From Blue Book of American Shipping.] 1 H.P. Cylinder. 2 1.P. Cylinder. 3 L. P.Cylinder. + Cylindercovertop. 5 Cylinder cover bottom. 6 Piston. 7 Piston packing ring. 8 Pistonrod. 9 Piston rod stuff ing box. 10 Relief yalye. 11 Valve chest. 12 Valve. 13 Valve stem. 14 Valve stem stuffing box. 15 Valve stem counter balance. 16 Column. 17 Bed Plate. 18 Main journal cap. 19 Main journal brass bushing 2O Main journal babbit lining. 21 Go ahead slide. 22 Backing slide. 23 Crosshead pin. 24 Crosshead shoes. 25 Connect- ing rod. 26 Connecting rod top brasses. 27 Connecting rod bottom brasses. 28 Connecting rod bolts. 29 Go ahead eccentric. SO Backing eccentric. 31 Go ahead . eecentricrod. 32 Backing eccentric rod. 33 Stephenson link. 34 Stephenson link block. 35 Valve stem guide. S36 Reversing engine. 37 Reversing engine oil cylinder. Reversing shaft. 39 Reversing arms to engine. 6 Shaft couplings. 4:7 Exhaust pipe. +8 Condenser. +49 Injection valve. 50 Channel plate. 51 Air pump. pump airchamber. 55 Feed aUnipe 6 Cooler pump. 57 Bilge pump. 58 Main throttle. 59 Auxiliary throttle. 10 tons and under, and ferry boats, sawmill boats, pile-drivers, and other nodescript similar small vessels, navigated outside of ports of entry and delivery, who has not served at least three years in the en gineer's department of a steam vessel, which experience must have been obtained within two years preceeding the application; provided that any person who has served regular apprenticeship to the ma- chinist trade in a marine engine works for a period of not less than three years, and any person who has served for a period of not less than three years as a locomotive engineer, stationary engineer, or as an apprentice to the machinist trade in a locomotive or stationary en- sine works, and any person who has graduated as a mechanical en- Sineer from a duly recognized school of technology may be licensed to serve as an engineer on steam vessels after having had not less than one year's experience in the engine department of steam vessels, Which experience must have been obtained either within one year be- fore or one year subsequent to the acquisition of the skilled knowledge above Mentioned, (which fact must be verified by the certificate in Reversing arms to links. 41 Adjusting screw. 42 Suspension rods. 4 3 Crank pin. 44 Crank web. 45 Shaft. 52 Air pump beam. 53 Air pump discharge. 54 Air _New Lights and Fog Signals. The efforts of the Lake Carriers' Association in behalf of aids to navigation during the past two or three years are being realizedin the actual establishment of new lights and fog signals. About Oct. 20, a 10- inch steam fog whistle, which will sound blasts of five seconds' ' duration separated by silent intervals of fifty-five seconds, will be es- tablished in the light station on Round island, straits of Mackinac. A new light and fog-signal station at Big Bay point, south side of Lake Superior, above Marquette, will be in operation about Oct. 20. The light is of the third order, showing fixed white varied by a white flash every twenty seconds. It is 108 feet above the mean lake level | and may be seen 183 miles in clear weather. Stanard rock light is N. E. N. from Big Bay point, distant 32 miles; Granite island light S. kK. by E. 4 E., distant 154 miles, and Huron island light N. W. by W. 2 W., distant 174 miles. Blasts of the steam tog whistle will be of three seconds' duration, separated by silent intervals of 17 seconds.