REGULAR SERIES 



kk2. The Effect of the Turn of the Bilge on Roll Damping, by J.Q. Thewa and 

 L. Undweber. Jan 1938. 8 pp., 9 figs. 



ki^3. Model XPB2Y-1 Airplane Hull - Additional Tests with Modified Afterbody - 

 Bureau of Aeronautics Project No. 3139. Feb 1938. 8 pp., 6 figs. 



Distributed only upon authorization of Bureau of Aeronautics. 



444. Experiments with a Model of Bureau of Aeronautics Mark XV Float - Proj- 



ect No. 3276. Feb 1938. n pp., 6 figs. Distributed only upon authorization of 

 Bureau of Aeronautics. 



445. The Ultimate and Critical Compressive Strength of Tee Stiffeners, by 



John Vasta. Feb 1938. 19 PP.. "10 figs. 



446. The Effect of Openings on the Ultimate Tensile Strength of Flat Plates. 



Mar 1938. 12 pp., 5 figs. 



447. Vibration Measurements Taken on Range Finder of U.S.S. VINCENNES, by 



D.F. Windenburg and R.T. McQoldrick. Apr 1938. 6 pp., 1 fig. 



448. XPB2Y-1 Airplane Hull - Tests on Original Lines with Modified Main Step. 



May 1938. 8 pp. , 5 figs. Distributed only upon authorization of Bureau of Aeronautics. 



449. Experiments with Vibration Neutralizers, by R.T. McQoldrick. May 1938. 



24 pp., 15 figs. 



450. Discontinuous Anti-Rolling Keels, by J.Q. Thews. May 1938. 26 pp., 15 



figs. 



451 . Experiments with a Model of XS03C-1 Airplane Float - Bureau of Aeronaut- 



ics Project 3307. Jun 1938. 9 PP.> 6 figs. Distributed only upon authoriza- 



tion of Bureau of Aeronautics. 



452. Compression Tests of Ship-Structure Assemblies, by John Vasta. Jun 1938. 



21 pp., 15 figs. 



453. Form Resistance Experiments of 1937 and 1938, by C.E. Janes. Jul 19W. 



37 pp., 65 figs. 



454. XS02U-1 Airplane Float - Pointed Step Type - Experiments with a Model 



of - Bu. Aer. Project No. 3315. Jul 1938. 9 PP.. 6 figs. Distributed 



only upon authorization of Bureau of Aeronautics . 



455. Preliminary XPBM-1 Hull Lines - Experiments with a Model of - Bureau of 



Aeronautics Project No. 3266. Aug 1938. 10 pp.. 6 figs. Distributed only 



upon authorization of Bureau of Aeronautics. 



456. XPBM-1 Hull Lines - Experiments with a Model of - Bureau of Aeronautics 



Project No. 3361. Sep 1938. 11 pp., 6 figs . Distributed only upon authorization 

 of Bureau of Aeronautics. 



457. The Elastic Stability of Tee Stiffeners, by D.F. Windenburg. Nov 1938. 



l6 pp., 5 figs. 



458. Tests of a One-Eighth Scale Model Turret Foundation for Battleships 55 



and 56, by Lt. R.D. Conrad, USN. Dec 1938. 99 PP-, 67 figs. 



:-p6 



