Modern Gasworks Practice

808 INDEX Maximum price, 5, 6, 8 Mechanical handling plant, 280 Méker furnace, 202 Mellor, J. W„ 201, 204, 205, 207, 208, 214, 223 Mercaptans in coal gas, 614 Meters, ordinary and slot, cost of, 35 size and capacity of, 791 station, cost of, 30 Methane, calorific power of, 402 catalytic production from water gas, 695 degradation of, 403 in coal gas, 413, 420, 422, 736, 738 in complete gas, 757 increase of volume from, 415 in mixed coal and water gas, 420, 736 in primary coal gas, 415 in producer gas, 64 in water gas, 736, 738 production of, 412 Methane hydrogen plant, 747 Methyl sulphides in coal gas, 614 Metropolitan Gas Act, 3, 5 Metropolitan Gas Undertakings, Capital of, 16 coke sold by, 62 Metroxide, 574 Meunier’s floats, 25S Middleton, A. H., 413 Millard and Lichty, 228 Mond gås, composition of, 736 plant, 116, 389 Motor spirit, recovery of from gas, 423 Motors, compound wound, 348 electric, 347 protected, 348 series, 348 shunt, 348 Mouthpiece, cost of various plants per, 25, 52 make per, 18 Multiple, gas, 364 Munich chamber ovens, 187, 220 Murdoch, 1, 2 Naphthalene, absorption of by charcoal, 465 carburation for, 472 condensation and, 465, 467 electrical precipitation of, 465 estimation of in gas, 475 formation of, 461 in coal gas, 413,422, 460,506 means of dealing witli, 465 oil fog and, 466 Saturation of coal gas, 463 sölvents for, 465, 467, 471 South Metropolitan Gas Co.’s process for, 469 structure of, 400 Naphthalene, vapour pressure of, 402 water gas tar as a solvent, 469 Naphthas in coal gas, 423, 465 Nerriére coke discharger, 303 Newbigging, J. G., 266 Newton Friend, 45 Nitrogen, distribution of in products, 386 in coal, 361 in coal gas, 412, 414, 420, 422, 736, 738 in complete gas, 757 in primary coal gas, 415 in producer gas, 64 in water gas, 736, 738 variation of during carbonizing period, 416 Non-statutory Company, 8 Norwich chamber ovens, 192 Oil, as naphthalene solvent, 468 distillates from enriching, 729 fog, 466 for coating gasholders, 672 for enrichment, 420, 421, 729 for lubricating exhausters, 489 gas, 698, 732 specific gravity of, 729 sprays for water gas plants, 727 storage of, 732 storage tank, cost of, 33 test for enriching, 729 Old Kent Road gasworks, producers at, 114 Olefines, 399, 424, 732 Optical pyrometers, 231 Orsat gas analysis apparatus, 130 Ortho-cresol, 400 Oughtibridge fireclay, 195 Over-cracking of gas, 401 Over-exhausting, effeot of, 412, 413 Oxide of Iron (.see also under Purification) artificial types, 573 basis of purchase, 586 composition of, 571 cyanogen in, 551 depth of layers of in purifiers, 578 efiect of ammonia on, 578 effeot of cyanides on, 552 extraction of cyanogen from spent, 563 ferric oxide in, 571 hydration of, 576, 5S2 importance of moisture in, 576 reactions witli H2S, 572 sampling and testing of, 586 souring of, 578 space occupied by, 363, 572 units of sulphur in spent, 586 Oxidizing atmosphere, 207, 209, 240 Oxygen, for water gas production, 698 in coal, 358, 359, 360, 361, 385