COMPOSITION OF CHAMBER DUST. 



713 



Analyses XXXIII and XXXIV. Chamber dust — Continued. 

 Eational. 



Portion soluble in water. 



Protosulphate of iron .t 



Sulphate of manganese A- 



Sulpliato of zinc 



Oxvchloi ide of lead . .■ 



Oxyhromitle of lead 



Oxyioilide of lead 



Chloride of calcinm 



Bromide of calciom 



Iodide of calcium 



Chloride of zinc 



Chloiide of nlaminium 



Chloride of magnesium 



Caustic magnesia 



Chloride of potassium - T 



Chloride of sodium ....'. 



Water 



Total 



Portion soluble in acids. 



Oxide of lead 



Sulphate of lead 



Phosphate of lead 



Sulphide of lea^l 



Chloride of lead 



Bromide of lead - 



Iodide of lead 



Chloride of silver 



Bromide of silver 



Iodide of silver 



Gold 



Protoenlphide of iron 



Protoxide of iron 



Peroxide of iron 



Oxide of bismuth 



Oxides of indium, thallium, 



metal 



Oxide of zinc 



Oxide of cadmium 



Sulphide of manganese 



Sulphide of zinc 



Oxide of manganese (irns04) .. 



Arsenious acid 



Oxide of antimony 



'. 08G500 

 1. 145000 

 I. 020200 

 '. 255850 

 i. 055000 

 I. 003000 

 I. 553000 

 1. 175000 

 I. 009000 

 1. 1200C0 

 I. 055500 

 I. 090000 

 ). 150000 

 ). 050000 

 ). 450000 

 ). 585000 



17. 816661 

 7. 954000 

 1. 059348 

 1. 255000 

 I. 72C700 

 0. 185790 

 0. 004900 

 0. 142712 

 0. 037670 

 0. 002580 

 0. 000100 

 0. 400000 

 7. 855290 



13. 814050 

 0.015006 



Traces 

 3. 795270 

 0. 020000 



0. 082380 

 0. 300000 



1. 903500 

 0. 233256 

 0. 100000 



0. 014700 

 0.158020 



0. 206310 

 0. 045400 

 0. 002990 

 0. 523390 

 0. 1746G0 

 0. 008510 

 0. 118500 

 0. 010700 

 0. 082900 

 0. 195000 

 0. 140000 

 0. 290000 

 0. 912500 

 2. 883580 



22. 451750 

 8. 898730 

 2. 783600 

 8.215000 

 1. 725620 

 0. 185080 

 0. 004880 

 0. 132730 

 0. 035040 

 0. 002540 

 0. 000066 

 0, 200000 

 C. 100000 



11.491000 

 0.10 1 000 



Traces 

 1. 454000 

 C. 014000 

 Trace 

 Trace 

 0. 750000 

 0. 120000 

 0. 105000 



Portion soluble in acid*— Cont'd. 

 Oxide of tin 



Selenions and tel'nrous acids 



Oxide of copper 



Titanic acid 



Alumina 



Carbonate of lime 



Lime 



Magnesia 



Carbonate of magnesia . 

 Total 



Portio7i insolubU in aeids.'^ 

 Silica (from slag and silicate of lead) 



XXXIII. XXXIV. 



0. 001500 

 Trace 



0. 005000 



0. 008000 



1. 955000 

 4. 529600 

 1. 661024 

 0.835119 



0. 001500 

 Marked 



trace 

 0. 012400 

 0. 031000 



1. 020000 

 5. 473000 



t. 303000 

 1.464000 



15. 126553 



2. 407000 



Graphite 



Total 



Portion soluble in water. . . 

 Portion soluble in acids. . . 

 Portion insoluble in acids . 

 Loss 



Total 



Silica (from quartz and refractory 



silicates) 



AIjOj, FezOa. PbO, ZnO, MgO, CaO, 



K2O, NasO (combined with SiOz). 2. 391447 

 Carbon (from charcoal, coke, and 



graphite) 9.240000 



Oxide of lead 



Oxide of zinc. 



Arsenious acid and oxide of anti 



mony. 



Baryta 



Sulphate of baryta 



Lime 



Magnesia 



Alumina 



Peroxide of iron 



Oxide of manganese 



Titanic acid 



Potash 



Soda 



29. 165000 



9. 704500 

 3. 780000 



5. 063000 



0. 907000 

 0. 100000 



Traces 



0.215000 



Trace 



0. 150000 



0. 080000 



1. 007000 

 0. 600400 



Trace 

 0. 001000 

 0. 035000 

 0. 025000 

 0. 665000 

 22. 3329C0 



2. 803 150 

 67. 699450 

 29. 165000 



0. 332500 



100. 000000 



2. 883580 

 74. 677930 

 22. 332900 



0. 105584 



100. 000000 



' The quantitative analysis of the insoluble portion of Analysis XXXIII was only roughly made, but the qualilativo 

 analysis of this portion was done carefully. The bases combined with silica are the same as those combined with silica in 

 the inaolublo n-sidoo of Analysis XXXIV. 



