574 



SUBJECT INDEX 



Iodides, metallic, 238 

 Iodine, 237 



an element, 237 



chloride, 238 



discovery of, 235 



oxide, 238 



properties of, 236 

 Iron, 7 



Age, 7 



dissolved by fixed air, 107 



gain in weight on burning, 28 



pure, does not act on copper 



sulphate, 533 

 does not dissolve in acids, 



533 



does not rust, 533 

 smelting of, 7 

 water decomposed by, 118 

 Isomeric change, 399 

 Isomorphism, 368 



complete and incomplete, 381 

 of alums, 370 

 of carbonates, 369 

 of garnets, 370 



of manganates, chromates, 

 selenates and sulphates, 371 

 of perchlorates and perman- 

 ganates, 371 

 of phosphates and arsenates, 



368 



of spinels, 382 

 perfect and imperfect, 382 

 Isomorphous mixtures, 370 



K 



Kinetic Theory of Gases, 324 

 Kopp's Law of Molecular Heats, 

 367 



Lactic acid, 13 



Laughing gas, 77 



Law of fixed proportions, 296, 



297 



accuracy of, 301 

 of isomorphism, 369 

 applications of, 371 

 exceptions to, 372 



Law of multiple proportions, 303 



accuracy of, 308 

 of octaves, 456 

 of periodicity, 458 

 of reciprocal proportions, 309 



accuracy of, 316 

 of volumes, 334 



an approximation, 334 



rejected by Dalton, 335 



Laws of chemical combination, 



296 

 Lead, 8 



atomic weight of, 303 

 calcined, 27 



in air over water or mer- 

 cury, 34 

 nitrate, composition of, 379 



formula of, 380 

 sulphate, composition of, 314, 



374. 375. 377 

 and sulphide, composition 



of, 317 



formulae of, 377 

 Lime, 7, 48 



an oxide, 283 



dry, properties of, 529, 533 

 Limestone, 5, 7, 48 

 Lime-water, 49 

 Litharge, 8 

 Litmus, 15 



turned red by fixed air, 102 

 Liver of sulphur, 170 

 Long periods, 460 

 Lunar caustic, 19 



M 



Magdeburg hemispheres, 320 

 Magnesia, 19 



dissolved by fixed air, 103 

 Magnesium, 281 

 Malic acid, 13 

 Manganese, 210 

 Marble, 5 

 Marcasite, 8 



crystals of, 8 



nodules of, 9 



Marsh gas, composition of, 157 

 decomposed by sparking, 

 157 



