38 



R- SERIES 



226. Method of Mechanical Impedance and the Electrical Analogy, by R.T. 

 McGoldrick. Sep 19^7- 21 pp., 5 figs. 



24-0. Dynamic and Static Compression Testing of 3/8-Inch Copper Balls, by 

 D.E. Abkowitz. Jul 1 947. 22 pp. , 10 figs. 



243 . A Brief Study of the Plastic Behavior of Steel in Way of the Tensile 



Fractures in a Group of Plate Specimens, by Capt. W. P. Roop, USN. Jul 

 1944. 27 pp. , 14 figs. 



244. Progress Report on Underwater Explosion Research - Bureau of Ships Sym- 



bol El 39- Apr 1944. 



Part 6 - Notes on the Shock in Ships Due to an Underwater Explosion, by 

 Dr. E.H. Kennard. pp. 1-3- 



Part J - A Family of Surfaces of Revolution Representing Shapes of De- 

 formed Circular Diaphragms, by Dr. G.E. Hudson, pp. 4-11, figs. 1-5. 



Part 8 - The Effect of Temperature Changes on Calibrations of Piezoelec- 

 tric Gages, by Dr. A. Borden, pp. 12-13. 



Part 9 - The Termination of Transmission Lines Used with Piezoelectric 

 Gages, by J.J. Donoghue and R. B. Baxter, pp. 14-18, figs. 6-7. 



246. Experimental Determination of the Suitability of Crystal Accelerometers 

 for Shock Measurements, by W.F. Curtis and H.L. Rich. May 1944. 6 pp., 

 1 fig- 



248. Progress Report on Underwater Explosion Research - Bureau of Ships Sym- 



bol El 39- May 1944. 



Part 10 - A Method for Determining the Energy Absorption of Thin Steel 

 Diaphragms under Hydrostatic Pressure, by M.A. Greenfield, pp. 1-10, 

 figs. 1-7- 



Part 11 - Errors Encountered in Calibrating Piezoelectric Gages with 

 Slow-Recording Instruments, by Dr. A. Borden, pp. 11-21, figs. 8-17. 



Part 12 - Damage to a Vertical Diaphragm As a Function of Depth, by C.T. 

 Johnson, pp. 22-26, figs. 18-20. 



Part 13 - Time-Displacement Studies of Diaphragms Deformed by Explosive 

 Loading, by Dr. G.E. Hudson, pp. 27-41, figs. 21-35- 



Part 14 - Plastic Deformation of and Absorption of Energy by Thin Circu- 

 lar Plates under Normal Loading, by Dr. A.N. Gleyzal. pp. 42-55, figs. 

 36-46. 



249. Welding Test 207 - Tensile Strength of Butt Welds in Special -Treatment 



Steel Plate, by J.W. Day. Nov 1947- 12 pp., 3 figs. 



251 . Catamaran Float Arrangement for Towing the Outboard Projector of a Model 

 NK2 Portable Supersonic Depth Recorder - Instructions for Assembling 

 and Towing, by P. Eisenberg. Jun 1944. 8 pp., 7 figs. 



252. A Study of the Surface Effects Caused by an Underwater Explosion. Part 

 1 - 1750 Pounds of Torpex near the Bottom in 40 Feet of Water, by 

 Capt. H.E. Saunders, USN, and Lt. D.C. Campbell, USNR. Jul 1944. 16 

 pp., 14 figs. 



