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October, 1919 are thus protected from injury, and all of their operations are carried. out at the maximum speed consistent with safety. Each controller provides a num- ber of motor speeds. The current for operating the motors is generated by a 25-kilowatt, 125-volt, Westinghouse turbine-generator. This French S hip UREAU § Veritas, the Brench classification sociéty, has de- cided to revise its specifica- tions covering manufacture of various steel and iron products used in ship construction. According to _ officials of the society this step has become necessary, owing to the fact that many American steel manufacturers have been adverse to accepting orders when its specifications were used. The new specifications will conform to the more general practices of American manufacturers and American shipbuilders. A revision of the specifications has been impossible prior to this time due to the unusual conditions during the war. The new rules are scheduled to be issued about the first of the com- ing year. Pending issuance of these tevisions, Bureau Veritas has issued formal notification that any orders for ship structural steel, boiler steel (in- cluding plates, tubes, stays and rivets), castings, forgings, etc., received speci- fying Bureau Veritas tests, inspection or specifications, are acceptable to them, when fabricated in accordance with the various specifications of the American Society for Testing Mate- rials as set forth in its standards of 1918, provided, of course, that such tests are performed in the presence of a duly authorized representative of the Bureau Veritas. Govern United States and Canada The revisions are intended to cover any materials manufactured, in the United States or Canada either for export or local consumption. Specifi- cations of the American Society for Testing Materials have been decided upon by the Bureau Veritas as being quite satisfactory and are believed to be most readily adaptable and agree- able to American practice and are so widely known that the mills can work to them without requesting special Instructions, In many cases, boiler material (plates, stays and "vets), it will be found the order designates the physical properties. In. such an instance the order must be Conformed to with the balance of in- especially with. the unit consists of a high speed turbine geared to a standard generator. It is operated by steam at pressures of from 75 to 250 pounds, and can be used either condensing or noncondensing. A gov- ernor keeps the speed, and therefore the voltage, constant, and an emergency stop prevents accidents due to over- THE MARINE REVIEW 459 speeding. This outfit is--only about 3 feet wide, 3 feet high, and 5% feet long, so that it can easily be installed in a corner of' the engine room. The crew of the No. 151 consists of a captain, chief engineer, fireman and four deck hands. The. winches are operated by the chief etigineer, Bureau Changes Rules spection in accordance with testing society specifications applying. Should designated physical requirements vary from the society's specifications, the'. analysis may be altered, with its per-: mission, to come within the range of, its physical property requirements. The specifications so acknowledged at this time areas follows, class to be specified class B medium: Structural steel for ships, A 12-16. Steel ship rivet bars and_ rivets, A 13-14. Steel forgings, A 18-18. Steel castings, A 27-16. Stay bolt iron, A 39-18. Steel boiler plate, A 30-18. Steel boiler rivet bars and _ rivets, A 31-14. oo Steel lap-welded and seamless boiler 'tubes, A52-18 as modified hereinafter. Steel boiler stays to be in accord- ance with order as to physical prop- erties and tested as follows: For material over 134-inch diameter, two tensile itests from each charge but when the number of bars as rolled from one charge exceeds 15, an additional test shall be made for each further lot of 15 bars or portion thereof. One cold and one quench bend test shall be made from each charge provided said charge does not exceed 15. barsas rolled; In this case an additional test will be re- quired for each lot of 15. bars or fraction thereof, For material 134-inch diameter and under, the required tests will be the same with the exception that the number of bars in each case shall be changed to read 50 instead of 15. | Exception is made to the American Society for Testing Materials A 52-18 as covering boiler tubes in that the following modification to clause B, paragraph 12, section 5, shall be effec- tive: All tubes shall be gaged with a Birmingham wire gage and shall not be less than the thickness specified except that tubes will be accepted on which the gage will go on tightly at thinnest point, nor shall the thickness at any point exceed that specified by more than three gages. Furthermore, the weight shall not exceed by more than.15 per cent the theoretical weight of the minimum , gage specified. Offers Three Courses ! _ The Brooklyn Polytechnic institute, Brooklyn, N. Y.,. will conduct courses in marine engineering, shipbuilding and yacht design starting late in September under the direction of Ray B. Whitman. ~The marine engineering course is divid- ed into 30 lectures and recitations while the ship drafting_ and yacht design courses comprise 30 drawing room classes and recitations, respectively. | The object of the first two courses is to give the students such a comptfe- hensive training that when they enter a _ shipyard or drafting room they will understand what is wanted of them. The course on yacht design is laid out to impart technical knowledge of this branch of naval architecture. It will enable students to design and draw a complete sail or power boat of their own choosing under skilled guidance. | Firms Consolidate The Chester Shipbuilding Co., Ltd, Chester, Pa., recently was merged with the Merchant Shipbuilding Corp., New 'York. For some time past, the Mer- chant corporation has been the only stockholder of the Chester company and the directors and executive officers of the two companies have been the same. Thus no changes in management or control result frori the merger. The Merchant Shipbuilding Corp. yard at Bristol, Pa. is operated under the United States shipping board. For this reason its operation will be kept sep- -arate from the yard at Chester, Pa. The Warrior River Development Co. has organized the Port of Birm- ingham County, Birmingham, Ala., with a capitalization of $600,000. The company plans to build derricks, wharves and side tracks at Short Creek: ' The derricks will have a capacity of 25 tons, equipped with 100- foot booms. The tonnage handled will consist of iron ore, nitrate of soda, pyrites and other ores. The engineering work is under the super- vision of Charles F. Wood.