88 



SUBJECT INDEX 



Elastically supported ring, experiments with, 

 704 

 frequency equation for, J0U- 

 Elasticity, measurement of, on WOLF, full- 

 scale, T-45 

 modulus of, of materials for periscope 

 tubes, R-l 6 

 of steel from PRESTON (DD327), full-scale, 

 318 

 of box girders, 441 

 of ships, full-scale, 297; T-2 



model, 298 

 theory of, 294 



in shipbuilding, T-2 

 Elaterite, frictional resistance of, 14 

 Electric power supply system, 561 

 Electric sparks, brilliance and duration of, 



T-l6l 

 Electrical analogy, use of, in solving hydro- 

 dynamic problems , T-225 

 use of in solving vibration problems, 551 ; 

 R-226 

 Electrical engine-pressure-indicating device, 



559 

 Electrical insulators, rigging, tensile tests 



of, 587 

 Electrographic oscillograph, T-1 51 

 Electrography, T-1 67 



Electromagnetic damping apparatus, 269 

 Electromagnetic distant -reading apparatus, 340 

 Electronic circuit, for condenser-type pressure 

 gage, 625 

 for diaphragm-type low-pressure gage, 665 

 Electronic integrator, low-frequency, 725 

 Electronic methods of observation, 626; R-51 , 

 R-54, R-62, R-78, R-79, R-86, R-201 , 

 R-214 

 Electronic regulation, of d-c power supply, 526 

 Electronic transmitter, for underwater sound, 



659 

 Electronic voltage regulator, 483, 502; R-51 , 



R-62 

 Elin-Hafergut method of welding, T-1 87 

 Ellipsoid, elastic deformation of, 606 

 ELLYSOH (DD454), gunfiring trials on, full- 

 scale, R-57 

 sncy cargo vessel. See Cargo vessel. 



Enemy minesweeper EMS-1 , full-scale trials with 



Voith-Schneider propellers, 649 

 Energy absorption, of circular plate, R-202 

 Energy-compression curves, for copper balls, 



R-240 

 Engine, marine, stopping and reversing, T-106 



See also specific kind of engine. 

 Engine-pressure-indicating device, electrical, 



559 

 Entrainment of frequency, 558 

 Entropy diagrams, internal-combustion engines, 



T-94 

 Equations, methods of solution of, T-77 



polynomial, method for calculation of roots 



of, 568 

 polynomial of sixth degree, for bodies of 

 revolution, 719 

 Erosion, bibliography, T-1 88 

 by cavitation, T-1 33, T-1 88 

 See also Corrosion. 

 Errors in calculated stresses, determination of, 



600 

 ESSO SUEZ (SS), tanker, standardization trials 



of, full-scale and model, 750 

 European diary, of Capt. H.E. Saunders, R-365 

 European method of testing self-propelled models, 



T-1 27 

 European model basins. See Model Basins, Euro- 

 pean. 

 Everdur brazing, for welding models, R-347, R-348 

 Excitation, parametric, 558 



Experimental boat-hull form, basic form, model 

 tests of, 740 

 Hacker form, model tests of, 776 

 Scheme I, model tests of, 764 

 Scheme J, model tests of, 738 

 Scheme L, model tests of, 757 

 Explosions, damage by, analysis of, R-296 

 detonating blast-type, T-1 68 

 effect of, on freely suspended target, R-279 

 internal pressures created by, in tubes, T-226 

 recording of, by high-speed photography, R-39; 



T-1 21 

 tests of, on hatch seal locks, T-1 91 

 See also Underwater explosions. 

 Explosive load, behavior of steel diaphragms 

 under, R-66 



