Index. 



185 



SILICEOUS MATTER, INSOLUBLE. 

 In raw phosphates, Determination 

 of 147 



SOIL. 

 Disintegration of phosphates in the. 22 



Formation of the 11 



Limy 12 



Raw phosphates, Use of, in various, 



23, 24 

 Varieties of 11 



SOUTH CAROLINA. 

 As a pioneer in the fertilizer in- 

 dustry 60 



Drift deposits in 73, 75 



Drying of phosphates, Methods of. 53, 54 



Fertilizers, Production of, in 61 



Manufacture of fertilizers in 60 



Manufacturers of fertilizers in, List 



of 60 



Mining law in 56, 57 



SOUTH CAROLINA PHOSPHATE. 

 Companies now engaged in mining. 55, 56 



Continuity of, deposits 48 



Cost of production of 59, 60 



Deposits 46-62 



Unexploited, of 61 



Dredging scoops used in mining. . .51, 52 

 Excavating and exporting, Methods 



of 53, 54 



Exploring, Methods of, deposits ... 49 

 Extent of deposits near Charleston. 4S 

 Geological formation of, deposits. . . 48 

 Holmes, Professor, on the discovery 



of, deposits 46 



Map of, deposits 48 



Mining of, Methods of 53-.5S 



Nature of material overlying 49, 50 



Oxides of iron and alumina in, De- 

 termination of 150-153 



Pit sinking in 49 



Production of, Annual 54 



River and land 51 



Rocks 46 



Specific gravity of 52 



Table of annual production of 54 



Thickness of strata in, deposits 49 



Typical sections of, deposits 50. 51 



Unexploited areas of 61 



SOUTH CAROLINA SUPERPHOSPHATES, 

 Output of 60, 61 



SPECIFIC GRAVCTY. 

 Comparison of degrees Saunas' with 173 



How to determine 166 



Of Pouth Carolina phosphates 52 



SPECULATIVE dealing in Florida phos- 

 phate land 63, 80 



SPRENGEL pump in acid chambers 90 



STANDARD solutions 167-170 



STEAM pressure in sulphuric acid 

 chambers 90 



STOICHIOMETRY .. 165 



STRAW. 



Percentage of mineral matter in 14 

 Percentage of phosphoric acid in ... 15 



STURTEV ANT'S phosphate mill 117. 118 



SUBSUT.PHOCYANIDE, Estimation of 

 copper as, in pyrites ores and resi- 

 dues 161 



SULPHUR. 



Estimation of, in brimstone 162 



" in pyrites 160 



SULPHURIC ACID. 

 Action of, on mineral phosphate of 



lime 108 



Air supply in manufacture of 88, 89 



Analysis of 163 



Chambers 90-93 



Chemistry of manufacturing pro- 

 cess of 84-90 



Composition of pure 102 



Cost of manufacture of, from py- 

 rites and brimstone 104, 105 



Gay Lussac and Glover towers in 



the manufacture of 91-101 



Manufacture of 84-102 



" " Early methods of .. 4 



Manufacture of, Plant required in.90, 91 



Nitre in manufacture of 85 



Nitre supply in, Regulation of 92 



Oxygen in manufacture of 85 



Plant required in manufacture of .90, 91 



Pumping siphon, or " egg " 98, 99 



Pyrites in manufacture of 86 



Reactions in manufacture of 85 



Table for preparing various strengths 



of, by adding water 174 



Table showing value of chamber 

 acid in SO 3 and H 2 SO 4 according 



to Baume 108 



Yields of, in actual practice from 



pyrites and brimstone 102 



SULPHURIC ANHYDRIDE. 

 Determination of, in raw phos- 

 phates 147 



Table showing value of chamber 



acid in 108 



SUPERPHOSPHATE MANUFACTURE. 

 Chemical equations involved in ... ing 



Chemistry of 106 



SUPERPHOSPHATES. 

 Acid phosphate of lime, Production 



of, in the manufacture of Ill 



Analysis of 155-158 



Chemical theory of high-grade, man- 

 ufacture 126 



Citrate soluble. Water and 112 



Composition of, as manufactured in 



United States 126 



Composition of, Variability in 106 



Consumption, World's, of 138 



Cost of producing high-grade ....... 132 



Cost of transportation of 127 



