482 



INDEX TO VOLUME 11. 



GU.N STEEL. 



objectionable, 343 ; pressure with 

 in, 300. Sec Ordnance. 

 Gun steel, and wrought iron, 

 strength, comparative of, 299. 



llAKT, Dr., formula for shrinkage of 

 guns, 402. 



Heat, lost by conduction and con- 

 vection, slightly affected by varia- 

 tion of pressure, Crookes's experi- 

 ments, 441. 



Heat radiated from sun. computa- 

 tions of by Fouillet and Herschel, 

 423 ; with no diminution of solar 

 temperature, 424 ; utilization of 

 only one 22.~>th millionth part. 

 424. 



Heat of well water, due to difference 

 of level of well, and gathering 

 ground, 385 ; due to passing 

 through heated strata deep down. 

 386 ; not due to mechanical fric- 

 tion in chalk, 385. 



Helical pump, 33!), 340; low lifts, 

 useful for, 340 ; propulsion of 

 ships on Ruthven's plan, appli- 

 cable for, 340. 



Helmholtz. shrinkage theory of the 

 sun's conservation, 424. 



Hematite ore not producible by elec- 

 tric deposit, 338 ; Siemens'*, C. W. 

 hypothesis regarding, viz., denu- 

 dation. 338. 



Herschel, heat radiated from the 

 sun, computation of, by, 423 ; low 

 temperature of sun. explanation 

 of by, 445 ; terrestrial attraction, 

 proposal of, to measure with spiral 

 spring. 359. 



Hydraulic compressor for guns, But- 

 ler's, H. J., application to field 

 guns, 417; Clerk, Colonel, ap- 

 plication to buffers, 331, and 

 stationary guns, 331, 417, Mon- 

 crieff, Major, recommended, 332 ; 

 raising gun to original height. 



IRON, 



suUicicnt for. 332 (fiientcHit. C. W., 

 no acknowledgment to. from Go- 

 vernment, 331 ; Clerk, Colonel, 

 reference to. 831 ; connection of 

 \\ith. 330. 417; description of. 

 331 ; Elsvvick, original plan of, 

 modified and extended at. 331). 



Hydraulic pressure applied to cranes, 

 presses, i!cc.. 387; transmission of 

 power by. 335. 



Hydraulic ram, friction of a mini- 

 mum. 88(5. 



Hydraulic transmission economical, 

 886. 



1 iii'ACT water-meter, 2 76 ; Siemens's. 

 C. W.. steps towards, 279. 



Imray, J.. helical pump, discussion 

 of p -per by, 339-341. 



Inch, fraction of, and: millimetre, 

 compared as standards, 305. 



Inflow to, and outflow of gases from 

 sun, 450. 



Instrument to indicate slight varia- 

 tions of terrestrial attraction, 359. 



Inventions, comparable to new-born 

 child, 342 ; consist in what, 414 ; 

 examination of, as carried on in 

 Germany, and in United States. 

 420; monopoly of, 423 ; patent 

 for, title to. 414 (protection for. 

 341 ; Bramwell's, K, important 

 address on, 342); regarding novelty 

 and usefulness of, 414 ; relating 

 to important national industries, 

 422. 



Inventors, and the government, 310 ; 

 guardians of inventions. 422 ; im- 

 perfect government trials, in- 

 jurious to, 310, 311 ; rights and 

 duties of, 342. 



Iron ball, superficial expansion of, 

 causing hollow towards centre, 

 would produce flotation on fused 

 iron, 409. 



Iron, breaking strength of, 398 ; 



