INDEX. 
1G3 
Page. 
Gabbro, Union County, Tenn., percentage 
of silica and vanadium in 50 
Garnet, symbols for 24 
Genth, F. A., analyses by 62,72 
reference to 70, 73 
Gerhardt, C, cited on pbosphamide 140 
reference to 77 
Gilpen, J. G., work of 78 
Gladstone, J. H., cited on action of pyro- 
pbosphodiamic acid and ferric sul- 
pbate 107 
cited on deutazophosphoric acid 90 
cited on formula for imidodiphosphoric 
acid 94 
cited on pyrophosphodiamicacid. 139 
cited on tripbosplionitrilic chloride 79 
reference to 96 
work of 77 
Gladstone, J. H., and Holmes—, cited on 
phosphaminsauire 90 
Gneiss, pyroxenic, Calaveras County, Cal., 
percentage of silica and vanadium in 50 
Granite, Union County, Tenn., percentage 
of silica in 50 
Granite-porphyry, Mount Ascutney, Vt., 
percentage of silica in 50 
Grotli, P., reference to 82 
Hallite, Chester County, Pa., percentage of 
vanadium in 55 
Hayes, A. A., quoted on occurrence of va- 
nadium 49 
Heptaphosphonitrilic chloride. See Chlo- 
ride, heptaphosphonitrilic. 
Heulandite, alkaline reaction of 157 
solubility of and percentage of alkalies 
in 159 
fiexametaphosphimic acid, consideration 
of salts of 149-151 
decomposition of 150-151 
ttexaphosphonitrilic chloride. See Chlo- 
ride, hexaphosphonitrilic. 
Hexa-silver trimetaphosphimate, constitu- 
tion of 107 
Hexa-silver triphosphonitrilate, constitu- 
tion of 107 
Hillebrand, W. F., mineralogical notes by. 57-76 
paper on the colorimetric estimation of 
small amounts of chromium by 37-43 
paper on the distribution and quantita- 
tive occurrence of vanadium and 
molybdenum in rocks of the United 
Stares 49-55 
paper on the volumetric estimation of 
vanadium in the presence of small 
amounts of chromium 44-48 
warning against the use of flnoriferous 
hydrogen in estimating titanium.. 50 
Hite. B. H., determinations by 87 
reference to '. 24,130 
Hobbs, W. II., cited on goldschmidtite 60 
Hofmann, A. W., cited on composition of 
phospham 86 
work of 78 
I lob ni's — , work of 77 
Page 
Holmes — , and Gladstone, J. H., cited on 
phosphaminseeure 90 
Hornblende granite, Cecil County, Md., per- 
centage of silica and vanadium in.. 50 
Hydromica, New Jersey, analysis of 154,155 
paper on 154-155 
Imidodiphosphoric acid, constitution of... 94 
observations on salts of 113-116 
decomposition of 115-116 
Jannasch, P., analyses by 36 
mentioned 35 
Jeffersonite, Franklin Furnace, N. J., analy- 
sis of 69 
mineralogical notes on 68-69 
percentage of vanadium in 55 
Jones, H. C, determination by 135 
Kalb — , analyses by 36 
reference to 35 
Kimble, G.W., acknowledgments to 70 
Knight, F. C, cited on calaverite from Crip- 
ple Creek, Colo 57 
Koningh, L. de, work of 37 
Kunz, G-. F., mineral collected by 60 
Labradorite-porphyrite, Michigamme iron 
district, Mich., percentage of silica 
and vanadium in 50 
Lamb, T. F., specimens collected by 69 
Latite, Tintic district, Utah, percentage of 
silica and vanadium in 50 
Laumontit e, alkaline reaction of 157 
solubility of and percentage of alkalies 
contained in 159 
Laurent, A., work of 77 
Lepidolite, alkaline reaction of 156 
solubility of and percentage of alkalies 
in 159 
Lepierre, C, cited on water in aualcite 23 
Leucite, alkaline reaction of 156 
symbols for 25 
solubility of and percentage of alkalies 
in 160 
Liebig, J. von, reference to 96,124,141 
work of 77 
Limestone, percentage of silica and vana- 
dium in 51 
Lintonite, Lake Superior, solubility of and 
percentage of alkalies in 159 
Long, J. H., acknowledgments to 77 
Magnesium salt of hexametaphosphimic 
acid, observations on 150 
Magnesium salts ol pentametaphosphimic 
acid, analyses of 144 
observations on 143-144 
Magnesium trimetaphosphimate, observa- 
tions on 100 
Manganese salts of tetrametaphosphimic 
acid, observations on 122 123 
Mariposite, Hear Valley, Cal., analyses of . . 75 
mineralogical notes on 74-75 
Meca, Torrico y, reference to 49 
Melanterite, analysis of 75 
mineralogical notes on 75-76 
Melilite-nepheline-basalt, Uvalde Count j , 
Tex., percentage of silica and vana- 
dium in 50 
