Iri'dea 



429 



PAGE. 



Chondrodite 6, 21, 28 



Chromic acid ; . . . . 413 



Chromite 5, 19, 25, 28, 158 



Chrysobeiyl 66, 323 



Chrysocolla 6, 21, 28 



Chrysolite 6, 21, 28 



Chrysotile 6, 21, 28 



Cinnabar, 



. 4, 18, 24, 28, 154, 157, 158 

 Citric acid. . 1—10, 16—32, 157, 158 

 Citric acid in Marsh's apparatus, 17 

 Cleavelandite, 321, 348, 350, 351, 352 

 Clinometer, new form of. . .263, 264 



Colophonite 66 



Colurobite.. 71, 350, 351 



Comparative solubility of sili- 

 cates in hydrochloric and 



citric acids 21 



Compass-clinometer 263, 264 



Connecticut, Trias of 220 — 254 



Cookeite. " 351 



Copper 5, 25, 28 



Coralline Limestone 124 



Craitonite 66 



"Crenated" forms of blood-cor- 

 puscles 267 



Crenic acid 31 



Crichtonite 68 



Crispite 65 



Cryolite 5, 20, 26, 28, 138 



Cryptocallite 32 



Crystalline precipitates, micro- 

 scopic examination of 12 



Cummingtonite 318 



Cuprite 5, 19, 28, 156, 158 



Cymatolite 319—321, 327-329 



338, 345—354 



analyses of 330, 331, 332 



. .constitution of. .333, 334, 335 

 microscopical characters 



of.. 336, 337, 340 



Cyrtolite 352 



Datolite 6, 21. 



Dechenite. . . 135, 137, 138, 139, 

 Decomposition of silicates by 



organic acids and ammonium 



fluoride 



Decomposition of sulphides by 



citric acid and saltpetre. . . .23, 

 Decomposing power of organic 



acids compared 



Delthyris Shale 



Descloizite. . .136, 138, 140, 141, 



Deweylite 6, 21, 



Diaspore 



140 



25 



21 

 123 



142 



28 

 318 



PAGE. 



Diopside 6, 26, 28 



Distinction between calamine 



and willemite 2, 21 



Dolomite 2, 7 — 14, 28 



Dry reagents for wet analyses, 



30, 158, 157 



Electrical preparation of ozone, 199 

 Electrolytic preparation of 



ozone 197, 198 



Elsberg, Louis, on blood-cor- 

 puscles 265—315 



Emery 318 



Enceladite 68, 71 



Eosite 140 



Epidote 6, 21, 26, 28 



Eruptive Rocks of the Trias, 



229, 241—246 



Erythronium 134 



Euclase 70 



Eumanite 70 



Eusynchite 136, 137, 139 



Euxenite 75 



Fahlunite 343 



Eavosite Limestone 124 



Fergusonite 75 



Ferrous oxalate 10 — 15 



Firing guns under water. . .164, 176 

 Fishes of the fresh waters of 



theU. S 92—120 



Fishes, fossil, new species of, 



127, 128, 188—192 

 Flowers, acted upon by chlo- 

 rine 218, 219 



by ozone 216—219 



by sulphurous acid 217 



218, 219 

 Fluoride of ammonium and or- 

 ganic acids 25 



Fluorite 5, 20, 26, 28 



Fluosilicic acid 413 



Fluofitanates 54 



Foot-prints in the Trias 225, 229 



230, 231 



Formate of lead 15 



Formic acid 7, 11, 15—25, 32 



Forms of red blood-corpuscles, 



266—268, 282—286, 312 

 Fossils, new Upper Silurian, 



121—124 

 Fossil fishes, new species of, 



127, 128, 188—192 



Fossil plants, leaf -scars of. . .41 — 46 



77—92, 129, 130 



Franklinite 5, 19, 25, 28, 158 



