REGULAE SERIES 



557. Photographs of the Flow ahout an NACA 25015 Airfoil at an Effective 



Reynolds Number of 480,000, by Ens. R.R. Staley, USNR. Apr 19i+6. 

 22 pp., 15 figs. 



558. Introduction to Non-Linear Mechanics. Part III - Non-Linear Resonance, 



by Dr. N. Minorsky. May 19k6. 132 pp., 30 figs. FOR OFFICIAL USE ONLY. 



559 • An Electrical Engine-Pressure-Indicating Device, by Lieut. Comdr. 

 G. Robert Mezger, USNR. A\ig 19^+7- 29 pp., 12 figs. 



560. Model Tests and Full-Scale Observations of the Launching of the USS 



SHANGRI-LA (CV38), by J.H. Curry and C.G. Moody. Jun 19^8. 52 pp., 



34 figs. 



561. A Regulated High-Voltage D-C Power Supply, by George W. Cook . Jul I9I+6. 



19 pp., 10 figs. 



562. Measurements of Strains and Deflections of a l/8-Scale Model of the 



Turret Stool for Cruisers of the CLl^t-ij- class, by E. Wenk, Jr. Sep 19^4^7. 



35 PP.> 1^ figs. 



563. Instruments at the David Taylor Model Basin for Measuring Vibration and 



Shock on Ship Structures and Machinery, by R.B. Allnutt and F. Mintz. 

 Jul 19it8. 100 pp., 60 figs. 



56^4-. Introduction to Non-Linear Mechanics. Part IV - Relaxation Oscillations, 

 by Dr. N. Minorsky. Sep 19^+6. 80 pp., 38 figs. FOE OFFICIAL USE ONLY. 



565. A Carrier-Type Strain Indicator, by George V/. Cook. Nov 19^6. 30 pp., 



18 figs. 



566. The Interaction between Shock -Mounted Equipment and Its Supporting 



Structure under a Step-Function Excitation, by S. Fifer and E.D. 

 Specht. Sep 19^^-7. 11 pp., k figs. 



567. CLASSIFIED 



568. A General Methods for the Numerical Calculation of the Roots of a 



Polynomial Equation, by A.N. Gleyzal and S. Fifer. Mar 19^8. 8 pp. 



1-33 



