KEGULAE SERIES 



5^5* A Tourmaline-Crystal Hydrophone, by M. Strasberg. Mar 19^6. 12 pp., 

 7 figs. 



5^6. Introduction to Non-Linear Mechanics. Part II - Analytical Methods of 

 Non-Linear Mechanics, by Dr. N. Minorsky. Sep 19^5* v. 111 pp., 

 l6 figs FOR OFFICIAL USE ONLY. 



5^1-7. Axial Vibration of Propulsion Systems of Battleships of the BB57 



through 60 Class, by R.T. McGoldrick. Jan lok8. 31 PP-, l8 figs. 



5^*8. Natural Frequencies of Side Plating, Bulkheads, Decks, and Radar and 

 Radio Supports, Measured Abroad Three Crusiers, Three Destroyers, 

 a Submarine, and a Battleship, by F.F. Vane. Apr 19^*8. 59 PP.; 

 35 figs. 



5^9. Design, Operation, and Maintenance of a Meter for Recording the Air 

 Content of Water in the David Taylor Model Basin Water Tunnels, by 

 Dr. A. Borden. Dec 19^+6. 26 pp., 8 figs. 



550. Characteristics of the NRL Mark 3 Boat -Type Buoy and Determination of 



Mooring-Line Sizes, by Ens. P. Eisenberg, USNR. Sep 19^5* iv, 75 PP.> 

 48 figs. 



551. Axial Vibration of Propulsion Systems of Battleships of the BB61 through 



66 Class, R.T. McGoldrick. Feb 19^. 37 PP., 32 figs. 



552. CLASSIFIED 



555. The Dynamical Stability of Torpedoes, by M.A. Garstens, Sc.D. Oct 1946. 

 25 pp., 7 figs. Revised Edition by L. Landweber and A.J. Volta 

 Feb 1949. 26 pp., 7 figs. 



554. Construction and Operation of the Losenhausen 44,000-Pound Vibration 



Generator, by E.O. Berdahl. Apr 19^7. 30 pp., 17 figs. 



555. CLASSIFIED. 



556. The Preparation of Letter Correspondence at the David Taylor Model Basin. 



Dec 1945. Canceled. 



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