EEGULAE SERIES 



638. Hydrostatic Tests of High-Pressure Steel Valves and Fittings, ty Clayton 



L. Pittiglio. May 19^9- 10 pp., 6 figs. 



639. Tests of a 20-root Model of a Proposed Twin-Screw Passenger and Trailer 



Ship to Determine Shaft Horsepower, by R.E. Frisby and C.J. Wilson. 



Mar 19^. ^ PP.^ 29 figs. Distributed only upon authorization of Sun shipbuilding and 

 Dry Dock Company. Supersedes Report 578. 



640. Shallow -Water Effect on the Performance of Single-Screw Vessels of U.S. 



Maritime Commission Design, Determined from Resistance, Propulsion, 



and Sinkage Tests of Models, by W.H. Norley. Feb 19^+8. 51 pp., 21 figs, 



Distributed only upon authorization of U.S. Army Engineers. 



6kl. Results of Additional Experiments with Models of the BuShips Design "A" 



Boat -Type and TMB Design Towing Targets, by R.M. Adler and Jack Posner. 

 Mar 19kS. 11 pp., 3 figs. 



6h2. Welding Test 357 - Tensile Strength of Cladded and Uncladded Butt Welds 



Made in 60-Pound Special -Treatment Steel, by C.L. Pittiglio. Aug I9I+8. 

 7 pp., 3 figs. 



6k^. Levels and Frequency Distribution of Noise in the Test Basins of the 

 David W. Taylor Model Basin, by V.L. Chrisler and M.L. Lasky. Jun 

 19iv8. 11 pp., Ik figs. 



6kk. The TMB Type AM-IA Direct -Coupled Amplifier for the Measurement of Slow 

 TrsJisient Impulses, by W.S. Campbell. Sep 19h&. 27 pp., 9 figs. 



6i+5. The TMB Type 5A Strain Indicator, by W.S. Campbell. Oct 19^+8. k6 pp., 

 19 figs. 



6k6. Power and Flow Characteristics for the Bethlehem Steel Company 28, 000- 

 Ton -Deadweight Single-Screw Tanker As Predicted from Tests with 

 Model ii-057, hy M.S. Harper. Apr 19^8. 15 pp., Ik figs. 



Distributed only upon authorization of Bethlehem Steel Company. 



SkJ . A Cavitation Method for the Development of Forms Having Specified Crit- 

 ical Cavitation Numbers, by P. Eisenberg. Sep 19^7. 1^ PP., 6 figs. 



6k8. The TMB Type-15Kl60 Strain Indicator, by Henry B.O. Davis. Oct 19if8. 

 33 pp., 18 figs. 



6k^. Trials Conducted on a German R130-Class Mine Sweeper Equipped with 

 Voith-Schneider Cycloidal Propellers, by E.T. Klemmer and P.K. 

 Johnson. Dec I9U8. 7I pp., 35 figs. 



I-itO 



LI- 



