/.\'/)i-:x TO 



//. 



48; 



tBOTHJOUCAL. 



permanent way, 415; mil way 

 liridires, design of, 897 ; for ship- 

 building, :(us ( .<// ;/;.<, copper 

 -h'Mthing for, 309 ; and /iiu: 

 sheathing for, Admiralty should 

 test invention, 809) ; and steel, 

 difference between, 412 ; wire and 

 solid iron. stiviiLrth of, 405 ; wire 

 heated to whiteness, and gradually 

 cooled, lighted up, and expanded, 

 410 ; and zinc in salt water, 

 experiments on, 309. 

 Isothermal expansion of air in tube, 

 858. 



KANT, on high temperature of sun, 

 445. 



Kennedy's water-metre, by area of 

 flow, 279. 



Kirk, A. C., cold, mechanical pro- 

 duction of, discussion of paper by, 

 : 24 329 ; refrigerating machine 

 of, 327. 



Krupp's anvil, 1300 tons weight, 

 :!".{; cast steel axles, 303; and 

 guns, 299, 300 ; and tyres, 303. 



LANCASTKK. 0. W., erosion of bore 

 in heavy guns ; muzzle-loading 

 projectiles, suggestion for im- 

 provement of, discussion of paper 

 by, 343-344. 



Langley, Professor, with bolometer 

 and photometer proved that at 

 height of 18,000 feet only 25 pur 

 cent, of solar energy luminous, 447. 



La Place's view of sun a mass of 

 incandescent matter, 445. 



Latitude effects on bathometer, 372, 

 373 ; effects on terrestrial attrac- 

 tion, 372. 



I. cut her for high-pressure joints, 393. 



Length and mass relations of units 

 of, 306. 



Lewis's piston water-meter, 277. 



MACH IN l.l.'l . 



Liccn. -i >, exclusive. desire of licei. 

 fur. U::. 



Light, effect of ha'.e on, 312 ; pene- 

 trating power of, quantity mid 

 intensity as affecting, 312 ; on 

 nium. effect of. 4o:. 



Lighting purposes, transmission of 

 electricity for, 388. 



Lighthouses, optical apparatus for, 

 311. 



LI 1.1 1 1 Exhibition, attraction meter 

 at. 384. 



Lockyer. .1. X.. contends for non- 

 existence of metalloids in space. 

 427. 



Locomotive, Siemens's. ( '. \V.. pro- 

 posed, with fire-box of heated 

 bricks for underground lines, 357 ; 

 method of heating, and quantity 

 of bricks required, 357. 



Longridge, J. A., Artilleiy, &c., con- 

 struction of, discussion of paper 

 by, 299-302 ; (gun of, bursting 

 strain of, 405 : construction of, 

 404 ; criticism of, 404 ; descrip- 

 tion of, cast-iron tube with iron 

 binding wire, 404 ; no longi- 

 tudinal strength in, 404 ; prac- 

 tical result of such construction 

 of, 404 ;) heavy ordnance, con- 

 struction of, discussion of paper 

 by, 402-407. 



Loss of heat in wire by convection. 

 Professor Stokes's su trirest ed me- 

 thod of determining. 441. 

 Lucas, J., chalk-water .system, dis- 

 cussion of paper by. 385-386. 

 Luminous rays in different sources 

 of light, percentage of, 447. 



McFARLANK, J., temperature of and 

 energy absorbed by heated wire, 

 440. 



McLaurin on latitude effects on 

 terrestrial attraction, 372. 



Machinery for mining purposes, 298. 

 i i _' 



