﻿INDEX. 



491 



Minerals — 



Herderite, Penfield and Harper, 107 ; 



Herderite crystal. Hidden, 209 ; 



Hiddenite, North Carolina, 483. 

 Lead silicate, artificial, Wheeler, 272; 



Lepidolites of Maine. Clarke, 353 ; 



Limonite pseudomorphs after py- 



rite, Meem, 274; Lucasite, Chaiard, 



375. 

 Mica, analysis of, 317 ; Micas, iron- 



lithia, of Cape Ann, Clarke, 358; 



Molybdenite crystal. Hidden, 210; 



Monazite, tvrin. Hidden. 207. 

 Phenacite from Colorado, Hidden, 210; 



Ptilolite. Cross and Eak ins. 117. 

 Quartz with basal plane, Hidden, 208. 

 Ralstonite, composition of, Penfield 



and Harper. 380. 

 Spodurnene. Hidden, 204; Sulphur. 



Dana, 389. 

 Tourmaline, black. Hidden, 205; Tur- 



quois from New Mexico. Clarke 



and Diller. 211. 

 Tauadinite from Arizona and New 



Mexico, Penfield. 441. 

 Termiculite. new, Chatard, 375. 

 Xenotime, Hidden, 206. 

 Zincite, Dana, 388. 

 Moon's surface, 326. 



N 



Newberry. J. S., Cretaceous Flora, 77. 







Obituary — 



Abich, Herman, 246. Tuckerman, 

 Edward. 1. "Whittlesey, Charles, 

 412, 487. 

 Orton. E., petroleum and gas of Ohio, 



241. 

 Osborne. T. B., higher oxides of copper, 

 333. 



Piano, time of contact between hammer 

 and string in. Weed, 366. 



Pickering, K G, maps of ultra violet 

 spectrum, 223 ; temperature and heat 

 of chemical combustion. 173. 



Penfield. S. L., herderite and beryl, 107; 

 meteorites from Utah and Missouri, 

 226 ; pseudomorphs of garnet, 307 ; 

 composition of ralstonite. 380 ; vana- 

 dinite from Arizona and New Mexico, 

 441. 



Photography, instantaneous, 481. 



R 



Pice, W. X., trap and sandstone in gorge 



of Farmington River, Conn.. 430. 

 Richards, R. H., zoetrope applied to 

 . crystallographic transformations, 164. 



Rocks— 



Andesites. 28 ; Basalt, 27 ; Conglom- 

 erates, origin of, 324; Dacite, 29; 

 Metamorphism, Dana, 69 ; Ophio- 

 litic and basic, of Italy, etc., 239 ; 

 Peridotite of Kentucky, Diller, 121 ; 

 Porphyritic structure. Dana, 71; 

 Sandstones, pumiceous, Pliocene, 

 MerriU. 199 ; Volcanic of Salvador, 

 Hague and Iddings. 26. 



Rockwood. C. G.. American earthquakes, 

 7. 



Roscoe, H. E., polymerization of hydro- 

 carbons, 76. 



Rutley, F., de vitrified glass, 78. 



Sandmeyer, Hypochlorites of ethyl and 

 methyl, 74. 



Saint-Lager, ancient herbaria, 79 ; no- 

 menclature, 485. 



Sargent, C. S.. journey of A. Michaux to 

 the mountains of Carolina, 466. 



Saussure, H. B., monument to, 246. 



Schumann, C, Flora Brasihensis, 166. 



Seely, H M., Strephochetus, 31. 



Shaler, A 7 ". S., geology of Cobscook Bay, 

 35. 



Sherman. 0. T., spectrum of comet C, 

 1886. 157. 



Snow, conductivity, etc., of, 481. 



Spectrum of comet, Sherman, 157 ; un- 

 recognized wave-lengths, Langley. 33 ; 

 maps of ultra violet, Pickering, 223. 



Sperry. F. L., pseudomorphs of garnet, 

 307.' 



Spherometer, well-, Mayer, 61. 



Springer, F., Revision of Palasoerinoidea, 

 410. 



Stars, photographic determinations of 

 positions, Gould, 369. 



Steel, strain-effect of sudden cooling, 

 Bar us and Strouhal 181; hydro- 

 electric effect of temper, Barus and 

 Strouhal, 276; viscosity of, and its 

 relation to temper, Barus and Strou- 

 hal, 414. 



Stellar, see Star. 



Strouhal. V., strain-effect of sudden 

 cooling in glass and steel, 181; hydro- 

 electric effect of temper in steel, 276; 

 viscosity of steel and its relation to 

 temper, 444. 



T 



Temper, hydro-electric effect of, in steel, 

 Barus and Strouhal, 276 ; viscosity 

 of steel and its relation to, Barus and 

 Strouhal, 444. 



Trowbridge, J., physical notices, 480. 



