486 



INDEX TO VOLUME II. 



difficulty with, 389 ; leakage of. 

 easily stopped, 301 ; light con- 

 struction, 395, 39G ; Paget, criti- 

 cism of, by, 396 (pressure of 

 steam did not cause rings to shear, 

 397 ; working of 1000 Ibs. per 'j 

 square inch, 390 ;) (rings for, 390, 

 393 ; metal of did not give longi- 

 tudinal strength to boiler, 396 ; 

 slipping transversely considered, 

 397 ;) steel for, 393 ; strength and 

 toughness combined in, 390 ; 

 testing of, pressure gradually in- 

 creased, 390, 391. 



Prevost's theory of exchanges, re- 

 ference to, 441. 



Projectile, Siemens'?, C. \V.. pro- 

 posed, to determine powdu 1 

 pressure on and atmospheric 

 resistance to passage of projectile. 

 300, 301 ; advantages of as regards 

 ordnance, ballistic laws, and 

 science generally, 302 ; descrip- 

 tion of, 300 ; diaphragm of, back- 

 ward, 300 ; forward, 301 ; fuses 

 or rockets in, 301 ; mechanism, 

 strength and simplicity of, 302 ; 

 rotating disc of, 301 ; scribing 

 point of, 301 ; weight of, 302. 



Property, real and patent, compared, 

 421. 



Protection for inventions, 341. 



Pump, helical. See Helical Pump. 



Pumping engines and direct-acting 

 compared, 298 ; weight of beam 

 of, action in, 298. 



RADIAL system of pneumatic de- 

 spatch. Sec Pneumatic Despatch 

 Radial System. 



Radiation, Dulong & Petit's formula 

 of, 434 ; Newton's views regard- 

 ing, 434. 



Radiation, dependence of on tempe- 

 rature, 434-6. 448 ; apparatus for 

 determination of, 43f>, 448 ; curve 



REFRIGERATING MACHINES, 

 of, 440 ; curve, equation natu- 

 ral of, 440, 441 ; electro-dynamo- 

 meter for, 436, 448 ; galvanometer 

 for, 436, 448 ; measurement of, in 

 watts of energy, 437, 448 ; results 

 by McFarlane, J., and Dewar, J., 

 440 ; tables of experiments of, 437, 

 438, 439 ; (temperature of wire 

 and energy absorbed, 440 ; expe- 

 riments and formula of, 439). 

 Rails of homogeneous steel instead of 



welded iron, 307. 



Railway accidents, 302 ; where oc- 

 curring, 303. 



Railway bridges, iron, design of, 397. 

 Railway tunnels, ventilation and 



working of, 356. 



Railways, axles and tyres of cast 

 steel for rolling stock of German, 

 303 ; no breakage of, 303 ; manu- 

 factured by Krupp, 303. 

 Railways, signals for, 332 ; automatic 

 system of, including switch, opti- 

 cal, and telegraphic signals, 333 ; 

 block system for, should be abso- 

 lute and complete, 333 : (German 

 mode of, 303, 304 ; apparatus 

 adopted, 304 ; trains announced 

 along line, 304); intervals at which 

 trainsshould follow each other, 303. 

 Ram, hydraulic, friction of a mini- 

 mum, 386. 

 Rankine on losses in air engines, 



387. 



Rapier, R. C., Railways, fixed signals 

 for, discussion of paper by, 332, 

 333. 

 Recoil of guns, friction in, reduction 



of, 417. 



Recce's refrigerating machine, 317. 

 Reed, J., Admiralty experiments, re, 



310. 



Refrangibility of glass affected by 

 lead. 311 ; uniform, how obtain- 

 able, 311. 



Refrigerating machines, air, 318 

 ammonia, 317; Carre's, 325 ; Gam- 



