None
Czudnowicz, C, cited 8« Davis, J. Thomas, method of separating zir- conium devised by 77 Dittrich,M., cited 100 Doelter, C, modification in method devised by 92 Drying oven for water determinations, de- scription and figure of 36-37 Drying temperatures in moisture determi- nations 33 Dunnington, F, P., cited 68 Eakins, L. G. , pycnometer method of 30 Earths, rare, cautions regarding, in basic acetate method 57 (footnote) estimation of 77-78 Erdmann, H., cited 107 Evaporation, description and figure of radi- ator for 23-24 Feldspars, error in calculations of, based on incomplete analyses 17 Ferric iron, determination of 59 partial reduction of, by faulty ignition. . 38, 56 Ferrous iron, determination of 88-96 figure showing Cooke's apparatus for determining 93 uncertainties in estimation of 96 Fischer, T., cited 87 Fluorine, determination of 103-105 qualitative detection of 105 Foullon, H. von, cited 110 Franz and Streit, cited 76 method of separating zirconium devised by 76-77 Fresenius, R., cited 62 (footnote) , 63 Friedel , C. , cited on water determinations . . 35 Friedheim and Briihl, cited 61,80 Genthand Penfleld, cited on precipitation of aluminum, iron, etc., by ammonia. . 55 Gibbs,Wolcott, cited 65 Gilbert, J. P., cited on silica determination. 52-53 Glucinum, rare occurrence of 21 Grooch,F. A.,amyl-alcohol method of sepa- rating lithium devised by 101 apparatus devised by 20 cited 60,107 (footnote) gravimetric method of estimating tita- nium devised by 71-73 method of estimating boron devised by. 107 methods of separating lithium devised by 99-100 method of water determination devised by 41-45 Gooch and Austin, cited 65, 78 Gooch and Jones, cited 107 (footnote) Gravimetric method for determining chro- mium 80 comparison of colorimetric method with 81-82 Grinding rock, mode of 31-32 Harper and Penfield, cited on washing of precipitated alumina 55 Hayes, A. A., cited 18 Heidonreich and Jannasch, boric-oxide method of decomposing silicates devised by 49-50 Hess and Campbell, cited 60 Hniebrand, W. F., cited 19, 63 (footnote), 68, 75, 80 (footnote), 82, 91 (footnote) , 110 Page. Hillebrand and Ransome, cited 88 (footnote) Hillebrand and Stokes, cited. . . 90 (footnote) Hydrofluoric acid, cautions concerning quality of 25 Hydrofluoric-acid method of determining ferrous iron , 92-94 Hydrogen peroxide, impurities of 25 Hydrogen sulphide, metals precipitable by . 54 Hygroscopic water, importance of deter- mining 35-^ modes.of determining 32-37 Iron, estimation of 57-59 ferrous, estimation of 88-96 ignition of precipitate of 56 methods of determining 54-60 preliminary procedure when material is scanty 79 solution by sodium carbonate fusion of traces of 58-59 Jannasch, P., methods of water determina- tion devised by 45-47 modes of silica determination devised by 48-50 Jannasch and Cloedt, cited 61,80 Jannasch and Heidenreich, boric-oxide method of decomposing silicates devised by 49-50 Jannasch and Weber, boric-oxide method for decomposing silicates devised by 50 use of oxygen blast in treatment of re- fractory silicates by the boric-oxide method 49-50 Jones and (Jooch, cited 107 (footnote) Knop,A., cited 57 (footnote) Koninck,L. L. de, cited 66 Koningh, L. de, colorimetric method of de- termining chromium devised by.. 80 Krauch, C, cited on tests for purity of chemical reagents 26 Lindemann, Otto, cited 88 Lithiimi, determination of 99-100 Luedeking.C, cited 107 Lunge, G., cited 106 Lunge and Millberg, cited 109 Magnesium, collection and ignition of pre- cipitated phosphate of 66 contamination by barium of precipi- tated phosphate of 67 contamination by calcium of precipi- tated phosphate of 67 determination of 64-^7 separation of calcium and strontium from 62 Manasse, O., cited 84 (footnote) Manganese, determination of 60-61 Mar, F. W., cited 75 Mastbaum, Hugo, cited 66 Metals precipitable by hydrogen sulphide. 54 Microcosmic salt, cautions concerning qual- ity of 25 Millberg and Lunge, cited 109 Mitchell and Wells, cited 57 (footnote) Mitscherlich method for determining fer- rous iron, defects of 8&-89, 89-90 modification of 90-«2 Moissan,H., cited 107 (footnote) INDEX. 113 Page. Moisture, modes <^f determining 32-37 Molybdenum, distribution of 18, 82 determination of 82-84 precipitation of, by liydrogen sul- phide 84 (footnote) qualitative test for 84 Nepheline, detection of 108-109 Ncubuuer, Hugo, cited 64, 65, 66 Nickel, determination of 61-62 Nitrogen, estimation of 107-108 Oven for water determination, description and figure of 37 Peiifield,S.L., cited 42 methods of water determination used by 38-41 mode of determining specific gravity recommended by 29 Penfield and Gen th, cited on precipitation of aluminum, iron, etc,, by ammonia. 56 Penfield and Harper, cited on washing of precipitated alumina 55 Penfield and Minor, cited 104 Penfield and Sperry, cited 107 (footnote) Phosphoric and titanic oxides, combined average of, in rocks of earth^s crust. 17 in alumina precipitate, peculiar occur- rence of 57 (footnote) Phosphorus, determination of 78-79 Pirsson, L. V. , arrangement of analyses pro- posed by 22 cited on detection of nepheline 108 Platinum, presence of, in filtrates from silica 54 removal of, from filtrates... 54, 57 (footnote) Platinum crucibles, loss in weight of, on blasting 53 (footnote) Potiissium bisulphate, cautions concerning mode of preparation of 25 Pratt, J. H., modification in method for de- termining ferrous iron devised by. . 94 Precht, II., cited 99 (footnote) Pycnoraeter method of determining specific gravity, description of 29-30 Pyrito, determinations of ferrous iron as affected by 9-1-95 Qualitative analyses, unadvisability of 26 Kadiator for evaporation, description of . . . 23 figure of , 24 Ramsay, William, cited 107 Ransome and Hillebrand, cited 88 (footnote) Reagents, quality of 25-26 Ridsdale,C.H., cited 58,86 Riggs, R. B., development of Gooch amyl- ak'ohol method of separating alka- lies from magnesium by 101 Rose, H., cited 59 (footnote) , 107 method of estimating fluorine devised by 103-105 Rosenbladt, T., method of estimating boron devised by 107 Sandberger, F., cited 21, 107, 110 Schmoeger, M., cited 66 Silica, method of separating alumina, etc., from 47-64 mode of drying and testing 52-63 modes of determining. 47-64 recovery from alumina precipitate of amounts of 56-67 BuU. 176 8 Page. Silica, separation of, in rocks contatning fluorine 47,60 (footnote), 103 soluble, estimation of 109-110 Silicates, modes of decomposition of 48-49 Silvestri, ,cited 107 Smith, J. Lawrence, figure showing cruci- ble for alkali determinations de- vised by 97 method of determining alkalies devised by 96-99 Sodium carbonate, limit of impurity of 25, 51 Sodium carbonate method for decomposing ■ silicates, description of 50-52 Sonstadt, E., cited 99 (footnote) Specific gravity, modes of determining 28-31 Sperry and Penfield, cited 107 (footnote) Stokes, H. N., acknowledgments to 110 cited 76,89,95 Stokes and Hillebrand, cited 90 ( footnote) Streit and Franz, method of separating zir- conium devised by 76-77 Strontium, determination of 62-64 percentage of rock content of 17-18 separation of barium from 63-64 separation of calcium from 63 Sulphides, determinations of ferrous iron as affected by 94-95 methods of distinguishing 105 nearly constant presence of, in rocks. . . 18-19 Sulphur, determination of 105-106 Tantalum, rare occurrence of 21 Thorium, determination of 77 rare occurrence of ^ 21 Titanic and phosphoric oxides, combined average of, in rocks of earth's crust, 17 in alumina precipitate, peculiar occur- rence of 57 (footnote) Titanium, estimation of 67-73 loss of, by evaporation with hydrofluoric acid alone 69 (footnote) preliminary procedure when material is scanty 79 solubility in caustic alkalies of oxide of. 60 Tongs for handling crucibles, description and figure of 28 Ulbricht,R., cited 66 Ullmann, C, cited 91 (footnote) Uranium, determination of 77 Vanadium, condition of 88 determination of 82-88 determinations of ferrous iron as af- fected by 94,95,96 distribution of 82 effect of, in estimation of total iron — 58 occurrence of 18 precipitation of, with iron, etc 58 preliminary procedure when material is scanty 79 qualitative tests for 84-86 tables showing results of tests for 86, 87 Vogt,J.H.L.,cited 89 Washin^to^, H. S., arrangement of analyses advocated by 22 Water, methods of determining 32-47 Water determination, drying oven for 87 drying temperatures in. - 83 figures of Jannasch's glass tubes for. ... 46 114 TKDEX. Paga Water detcriniiiatioii, figureN Hhciwiiig Uooch tubulated iilatinum vriu'iblv for 42,43,41 figure showing rcuflelcVs fire-brick and charcoal oven for 40 figures showing lVnficld'8 tulies for — 3U, 40 Weber and Jannasch, boric-oxide method for decomposing silicates devised by .W use of oxygen blast in treatment of re- fractory silicates by the boric-oxide method 49-00 Page. Wtfller, A., colorimetric estimation of tita- nium by method of fti-Si Wells and Mitchell, cited 57 (footnote) Whitfield, J. E., cited 107 Wulfing, E. A. . cited 89, lUO (footnote) Zinc, detennination of 60-41 Zimmennann, C, mercuric oxi'^o method of Ki'iNiriiting alkalies devised by .. 100 Zirconium, disturbing efTcctof, in gravimet- ric estimation of titanium 72-78 c>8timation of 78-77 3 bios 01*) 805 oai. 