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114 MARINE REVIEW NEW push open the valve when the connec- tion is being made and thus admit the pressure to that section of the line. An eccentric clamping ring quickly locks the two halves of the coupling together. This device is claimed to save the time of the operator and also the volume of air in the line. between the compressor and the point of cut off. Stee. Motorships Will Be More Widely Used On his arrival in this country re- cently, Sir Joseph Isherwood spoke op- timistically on the prospects for mo- torships and cited the instance of the Tairfield Shipbuilding Co. in construct- ing a 20,000-ton passenger and freight steamship for the New Zealand Steam- ship Co. which will be 600 feet long and will be propelled by four diesel en- gines. A speed of 20 knots is called for. Prior installations of diesel engines have usually been in smaller ships with speeds not exceeding 12 knots. Sells 33 Diesel Engines The shipping board owned 33 die- sel engines, the last of which were sold in January. These engines were disposed of as follows: No. HP. Buyer 13—900 War Department. 3—900 Munson Line, N. Y. 2—825, Standard Oil Co., N. Y. 3—825 Frank Lynch, Benson Lumber Co., San Diego, Cal. f 1—825 Federal Light & Traction Co., N. Y. 4—825 Moore Shipbuilding Co., San Fran- cisco. 2—750 Port of Portland, Portland, 1—750 2-—750 Oreg. Universal. Machine Co; F 2—320 Bowling Green, O. Fears Shipbuilding Corp., Kearney, Cary Davis Towing Co., Seattle. OIL BURNER ADAPTED FOR USE UNDER SCOTCH BOILERS New Refr1 geration Method A new method ot retrigeration, callee the Ottosen, has been developed in Sweden. The reports on actual opera- tion of this method are very scant in detail, but it is said.to be many times faster than air freezing and that food- stuffs so treated retains its structure, the «uality remains unchanged so as to be exactly like fresh when thawed, and the elements of taste as well as nourish- ment remain. The method has_ been applied to fish with’ considerable suc- cess, in one instance over a period 01 15 days transportation. The temperature can be varied from 16 below zero centi- grade, up according to the- requirements of the different kinds of foods such as eggs, tresh fruits, etc. BURNER IS March, 1923 Burner for Use Under Scotch Boilers Results secured for many years with its mechanical oil burners under its own boiler has led the Babcock & Wilcox Co. New York, to adapt for use under Scotch boilers its latest type burner called the San Diego. This burner adheres to the same general design covering all the various types of burners built by the Babcock & Wilcox Co. Its size and proportions, however, are made to conform to Scotch boiler furnace conditions. This burner is hinged to the furnace front plate and the simple operation of breaking one pipe joint and dropping the latch enables one at a moment’s notice to swing out the entire burner and register, leaving free access to the furnace. Several installations of the burners have been made on Scotch boilers and the results ob- tained are said to have been quite sat- isfactory. 'The operators have re- ported a saving in fuel. One com- pany after atest on ofie’ of its vessels has just equipped seven other vessels with this burner. Free Rocking.: x ace Ham- mer Die Beaudry & ‘Co., Inc., Boston, have developed a new combination hammer die for drawing tapers. This is de- signed for any make or size of trip, air or steam hammer, by the use of which one man, it is. said, in one heat can draw any taper that can be handled under a hammer. As shown in the illustration, one end is provided with a ‘tilting face so supported that -~ SWUNG OUT BY BREAKING ONE PIPE JOINT AND DROPPING THE LATCH