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Silver solder
574
CURRENT TOPICS.
[J. F. I.
Safety of Life at Sea.--Recommendations of the committee appointed by the Secretary of Commerce for the use of the American delegation to the International Conference on Safety of Life at Sea to be held in London during the present month: I. That efficient apparatus for the radio communication "be required on all ships in foreign trade which carry 50 persons, or more (passengers or crew, or both combined), navigating the ocean between ports more than 2oo nautical miles distant from one another. 2. That apparatus, to be deemed efficient, must transmit messages with sufficient power to be received by day over sea at a distance of at least ioo nautical miles by a ship equipped with apparatus equal to that of the transmitting ship. 3. That an auxiliary power supply should be provided, independent of the vessel's main electric power plant, which will enable the sending set for at least four hours to send messages over a distance of at least IOO nautical miles by day. 4. That (a) two first-grade operators should be required on all such ships maintaining a constant service, also on all such ships carrying ioo or more passengers. (b) One first-grade and another first-or second-grade operator should be required on all other such passenger ships. (c) One operator (firstor second grade) and one cargo operator or watcher should bc required on all such cargo boats. The recommendations of the committee arc based not only on the laws of the United States but also in principle on the London International Convention and the laws of Canada and Australia. The laws of Canada and Australia do not specifically require a constant wireless watch on cargo boats, but authorize the administrationsof those colonies to impose that requirement. The second operator or watcher on a cargo boat will rarely be required for the safety of his ship or the crew of which he is a member. The constant watch is to bc maintained almost entirely for the purpose of enabling the master of the cargo boat to be at aU times in a position to receive radio distresscallsand to render the assistance within his power. The proposition, accordingly, is in the interests of the safety of the seafaring world, and is, in effect,a tax upon the owners of such cargo boats for the promotion of the safety of others. The committee comprised E. T. Chamberlain, Commissioner of Navigation, Chairman; W . H. G. Bul.lard, Captain, U. S. Navy, Superintendent Naval Radio S'ervice; C. McK. Saltzman, Major, U. S. Army, Assistant to Chief Signal Officer; Jno. Q. Walton, Constructor, Revenue-Cutter Service; Frederick A. Kolster, Bureau of Standards. Silver Solder. ANON. (Brass World, ix, 9, 3o6.)--Silve r solder is far superior to spelter solder for brazing metals, as it melts more readily and forms a stronger and tougher joint. As its advantages are appreciated it is becoming more and more extensively used.
CURRENT TOPICS.
[J. F. I.
Safety of Life at Sea.--Recommendations of the committee appointed by the Secretary of Commerce for the use of the American delegation to the International Conference on Safety of Life at Sea to be held in London during the present month: I. That efficient apparatus for the radio communication "be required on all ships in foreign trade which carry 50 persons, or more (passengers or crew, or both combined), navigating the ocean between ports more than 2oo nautical miles distant from one another. 2. That apparatus, to be deemed efficient, must transmit messages with sufficient power to be received by day over sea at a distance of at least ioo nautical miles by a ship equipped with apparatus equal to that of the transmitting ship. 3. That an auxiliary power supply should be provided, independent of the vessel's main electric power plant, which will enable the sending set for at least four hours to send messages over a distance of at least IOO nautical miles by day. 4. That (a) two first-grade operators should be required on all such ships maintaining a constant service, also on all such ships carrying ioo or more passengers. (b) One first-grade and another first-or second-grade operator should be required on all other such passenger ships. (c) One operator (firstor second grade) and one cargo operator or watcher should bc required on all such cargo boats. The recommendations of the committee arc based not only on the laws of the United States but also in principle on the London International Convention and the laws of Canada and Australia. The laws of Canada and Australia do not specifically require a constant wireless watch on cargo boats, but authorize the administrationsof those colonies to impose that requirement. The second operator or watcher on a cargo boat will rarely be required for the safety of his ship or the crew of which he is a member. The constant watch is to bc maintained almost entirely for the purpose of enabling the master of the cargo boat to be at aU times in a position to receive radio distresscallsand to render the assistance within his power. The proposition, accordingly, is in the interests of the safety of the seafaring world, and is, in effect,a tax upon the owners of such cargo boats for the promotion of the safety of others. The committee comprised E. T. Chamberlain, Commissioner of Navigation, Chairman; W . H. G. Bul.lard, Captain, U. S. Navy, Superintendent Naval Radio S'ervice; C. McK. Saltzman, Major, U. S. Army, Assistant to Chief Signal Officer; Jno. Q. Walton, Constructor, Revenue-Cutter Service; Frederick A. Kolster, Bureau of Standards. Silver Solder. ANON. (Brass World, ix, 9, 3o6.)--Silve r solder is far superior to spelter solder for brazing metals, as it melts more readily and forms a stronger and tougher joint. As its advantages are appreciated it is becoming more and more extensively used.