None
Iron, application of, with Jewell system 46 compounds, influence of the solubility of the unoxidized, on the electrolytic preparation of iron hydrate 396 on their use as coagulants 381 metallic, by the Anderson process, applicability of, in the purification of Ohio river water 382 persulphate of, action of, as a coagulant 381 composition of lot of, used by the Water Company in 1897 337 cost of, annual average estimated, for the purification of Ohio river water 437 effect of, on the quality of the purified water 3S1, 432 efficiency of, as a coagulant 413-416, protosulphate of, action of, as a coagulant 381 composition of lot of, used by the Water Company, in 1897 337 Jewell system, see System, Jewell. Lime used with the Jewell system 45, 52 effect of use of 251 see also Sulphate, and Carbonate of lime. MacDougall system, see System, MacDougall polarite. Magnets, Electro-, effect of, on the rate of electrolytic formation of aluminum hydrate.. 296 see also Devices, Harris Company; and System, Harris magneto-electric. Manganese, permanganates of lime and potash, action of, as coagulants 382 cost of 382 Microscopical analyses of effluents (tables) 127 Ohio river water (table) 36-37 Mineral analyses of effluents (tables) 127 Ohio river water (table) 34-35 methods of 448 Ohio river water, see Water, Ohio river. Operation, manner of, of Warren, Jewell, Western gravity and Western pressure systems... 96-105 records of, see the several systems and devices. Organic matter, amounts of, see Chemical analyses. effect of electricity on 292 removal of, by Warren, Jewell, Western gravity and Western pressure systems 223-227 Oxygen consumed, see Carbonaceous matter. influence of, on the electrolytic preparation of iron hydrate 392 in Ohio river water 33 after purification by Warren, Jewell, Western gravity and Western pressure systems 243 influence of the use of electrolytically prepared coagulants on the amount of, after purifica- tion 430 P Passivity, see Electrodes, passivity of. Periods, outline of the twenty, into which the in- vestigations from Oct. 1895 to Aug. 1896 were divided 216-219 458 Per manga nates. see Ma nganese. Per ulphale of i set Iron, per ulnhate of. Pol rile, j« Sys . \ acDougal polarite. Potash alum, se A » m potash. Pressure, see Head. Prodigiosus, B., passage of, through Warr - Western gravity and Western pressure ftln Protosulphate of iron, see Iron, protosulphat Purification of water, outline of history of.. Sedimentation, and i systems and devices Rate of f Regulate Sand layer, area o e of. of Jewell filter 70 ?rn gravity fil- 83. S, Jewell system Warren system Western gravity sys- quality nf effluent 256 ner of operation of, 9S. 101, 103, 104, 33t, 323, 343 r used, kind of 25O seil, influence of 313. i6a J' 1 (ilte: We; vity nlt< 73 ;s ol, influence n( Jewell filte i.igulalion. effect of use of e hydra tally prepare - 414 coagulan provisions (or, 57-64. 91. 335 process of 57 purification of Ohio river water by, 58. 65-69.78, 371, 367. 440 1 with purified Ohio river water.. 431 ition of lot of, used by (he Water my in 1B97 338 sand layer 426, 443 le incrusting constituents 433 n, Harris magneto-electric. io river water. 427. 443 -SuliitMt Sulphal . Of 1 Jewell filter Warren filter Western gravity filler Western pressure filler. . .. na, see Alumina, sulphate of. - 4-J3 • 73 ing c iimmarics, of results of investigations from Oct. '895 10 Aug. 16, 16, explanations of suspended matter in water for successful filtration partial protective inf: of, against corrosive 5-23 a/so Chem connection with.. etc of, imounts of (table), by days.... 50 by runs 196-204 (imposition of lots of 41 levices for application of.... 43-46 solutions of, strength of (table) 47 if, inventory of 9°-93 383 r liable) Gu cr watt 253, 26 440 nof. 107 46 il, average by days 228-231 runs....196-204 d of organic matter 233-227 INDEX. 459 PARK System, Jewell — Concluded. effluent of, analyses of, bacterial 148-169 chemical.. % 117-122 microscopical 127 mineral 127 bacteria in, see bacterial efficiency, clearness of, average daily degree of. 222 filter of, agitator So controller, automatic 79 description of, general.. 77 filler tank 77 prodigiosus B., application of, to.... 249 sand layer, area of surface of 79 bacteria in 257 device for cleaning 79 kinds of sand 79 nitrogen as albuminoid ammonia in 257 thickness of 79 Strainer system 78 Iron, application of metallic 46 lime, amounts used, average by days 52 devices for the application of 45 solutions of, strengths of 52 operation of, delays of 94 manner of 99 records of, description of tables., no summaries of, 234, 240, 241 tables of 196-204 regulating devices, special 105 repairs of 93 sedimentation with coagulation, devices for 59 time occupied by 95 System, MacDougall polarite, alumina, sulphate of, application of. 323-326 bacterial analyses in connection with 330 bacterial results, summary of, by days 328 chemical analyses in connection with 329 see also Water, Ohio river. chemical results, summary of, by days 328 clay extractor 319 conclusions in regard to 327 description of, general 318 efficiency of, summary of, by days 328 effluent, quality of 323 iron tank with baffle plates 318 operation of 32 1-326 polarite, analysis of 322 polarite filter, description of 320 effect of air pocketing in 321 filtering materials of 322 modifications of 321 System, Warren, alumina, sulphate of, amounts of (tables), by days 50 by runs 187-196 composition of lots of 41 devices for the application of 42 solutions of, strength of (tables). 48 FACE System, Warren — Concluded. appurtenances of, inventory of 9^~93 attention given to 107 efficiency of, bacterial, average by days . . 228-231 runs. . 187-196 removal of organic matter. . 223-227 effluent of, analyses of, bacterial. ....... 12S-148 chemical n 2-1 17 microscopical 127 mineral 127 bacteria in. see bacterial efficiency, clearness of, average daily de- gree of 222 filter of, agitator 75 description of, general 71 filter tank 71 filtered water chamber 73 prodigiosus K., application of, to ... . 249 sand layer, area of surface of 74 bacteria in 257 device for cleaning 74 kinds of sand 73 nitrogen as albuminoid ammonia in 257 thickness of 73 strainer system 72 weir 73 operation of, delays of 94 manner of 96 records of, description of tables no summaries of, 232, 240, 241 tables of 187-196 regulating devices, special 105 repairs of 93 sedimentation with coagulation, devices for.. . 58 purification by 61 time occupied by 95 System, Western (parts common to both), appurtenances, inventory of 90-93 attention given to 107 chemicals used 41 amounts of potash alum used. . 51 sulphate of alumina used ((able) 51 solutions of, strength of (table) 49 sedimentation with coagulation, devices for. . . 60 purification by 63 System, Western gravity, appurtenances of, inventory of 90-93 chemicals used, average amounts of, by runs, 204-207 efficiency of, bacterial, average by days.. 228-231 average by runs. . . 204-207 removal of organic matter... 223-227 effluent of, analyses of, bacterial 169-174 chemical 122 microscopical 127 mineral 127 effluent of, bacteria in, see bacterial efficiency, clearness of, average daily degree of 222 4O0 INDEX. FACE System, Western gravity — Concluded, filter of, description of filters (A) and (B) 8 1 prodigiosus B. t application of, to.... 249 filter (A), description of 82 filter tank 82 sand layer, area of surface of 83 bacteria in 257 device for cleaning 83 kinds of sand 83 nitrogen as albuminoid ammonia in 257 thickness of 82 strainer system 82 filter (B), description of 83 filter tank 83 sand layer, area of surface of 84 bacteria in 257 device for cleaning 84 kinds of sand 84 nitrogen as albuminoid ammonia in 257 thickness of 84 strainer system 84 operation of, delays of 94 manner of 102, 103 records of, description of tables., no summaries of, 236, 240, 241 tables of 204-207 legulating devices, special 105 repairs of 93 time occupied by 95 see also System, Western (parts common to both). System, Western pressure, appurtenances, inventory of (?)-93 chemicals used, average amounts of, by runs, 207-214 efficiency of, bacterial, average by days... 225-231 runs... 207-214 removal of organic matter.. 223-227 effluent of, analyses of, bacterial 174-106 chemical 124-126 microscopical 127 mineral 127 bacteria in, see bacterial efficiency, clearness of, average daily degree of.. 222 filler of, description of, general S5 filter chamber 86 prodigiosus B., application of, to... 249 sand layer, area of surface of S7 bacteria in 257 device for cleaning SS kinds of sand 87 nitrogen as albuminoid ammonia in 257 thickness of S7 strainer system S6 operation of delays of 94 manner of 104 records of, description of tables, no PAGK System, Western pressure — Concluded. Operation of records of, summaries of, 238,240,241 tables of 207-214 regulating devices, special 105 repairs of 93 time occupied by 95 Systems of purification investigated 1-4 Tables, see specific topic. Tap water, city, bacteria in (table) 69 Tests, from Oct. 1895 to Aug. 1896, conditions of 11 outline of 1 Time occupied in various ways by the Warren, Jewell, Western gravity and Western pressure systems.... 93-95 Totals, grand, for the investigations from Oct. 1895 to Aug. 1896 240 Warren system, see System, Warren. Water, Ohio river, after purification, appearance of 242, 426 adaptability for boiler use, 245, 429, 432 biological character of 248, 427 carbonic acid in.... 53, 244, 431-434 color of 243 corrosion of iron by 244, 431-434 lead by 434 mineral matter in 426 odor of 243, 426 organic matter in 243, 426 oxygen, dissolved, in...... 243, 427 soap required 432 storage of 427, 443 taste of 243, 426 undecomposed coagulants in 427 uniformity of quality of 429 analyses of, bacterial 39 chemical 21-31 microscopical 36 mineral 34 application of coagulation to 57 character of, general 15 biological, 16, 36-39 chemical, 16, 20-34 factors affecting the 15 physical 15 com Position of, bacteria in, numbers of, see bacterial analyses. Bacterial analyses. Bacterial analyses. Water, Ohio river, after purification — Concluded. composition of, nitrogen as albu- minoid ammonia 223-227 factors which influenced the quality of, after purification, 250-257, 405, 431-434 purification of, accessibility of parts of system 443 applicability of meth- ods investigated, 271. 439 attention required, 258, 267, 443 coagulant, amount, 273. 430. 441 kind 440 imperative- ness of use of. . 439 point of ap- plication of 441 PACK Water, Ohio river, purification of, cost of , coagulant for, 435-437 elements of.. . 268 factors which affected the. 267 filters for 442 filtration. .. .422-425. 441 sand layer for. . .426, 442 cleaning 41 of.. 424, 443 location of 442 sedimentation, plain, 359. 376 -378, 440 with co- agula- tion . . . 440 Weir used in the Warren system 73 Western gravity system, see System, Western gravity. Western pressure system, see System, Western pres- sure. I 'SECTION OF JEWELL GRAVITY SYSTEM." PLATE VIII. WARREN FILTER JEWELL FILTER B J m mi V SECTION ON A-B WESTERN PRESSURE FILTER WESTERN GRAVITV FILTER ''TYPICAL AREAS OF STRAINER FLOORS,". 