GENERAL INDEX. 



299 



PAGE 



195 



203 



12G 

 278 

 200 

 222 

 264 

 71 

 316 

 187 

 193 

 191 

 187 

 -185 

 255 

 184 

 345 

 191 

 188 

 188 



Hexahydrobpiizene 



" Hey's operation " 



" Hisli Trail " in San Juan 



Monntains • 



History of Academy 233, 



Holrniuni 



Hornl)ien(le schist 



gneiss 



Hospitals, infection of walls. . 



Hudson River slate 



Hy<lriodi(! aci<l 



Hydrochloric acid 



solidification of 



Hydrogen 185, 186, 



as primary matter. ... 184- 



in comets 



in stars 



in sun 



liquefaction of 190, 



weight of atom of 



peroxide of 



Hydroxyl 



Idunium 200 



Igneous rocks 131-180. 332, 230 



Imperfections in rock-crystals, 



275-376 

 Inception and progress of rail- 

 ways 137-153 



Indian character 303 



garnets 335, 336 



mounds 73 



remedies 303 



scraper 73 



wars, cause of 203 



Indians of South America 327 



Indigo 197 



Inferior planets 347 



Influence of vegetation in 



cities, etc 364 



Infusorian, phosphorescent. .15-16 



Inscriptions in Yucatan 173-177 



Instruments, astronomic 361 



Iron in comets 254, 255 



meteoric 74, 224, 337 



Iron ore. Cranberry mine 331 



Staten Island 229 



Iron oxide, from pyrites 193 



in Staten Island 339 



Iroquois, significance of flora 



to 203 



Isomerism 197 



Japanese ci-ystal spher( 



233, 267-275 



PAGE 



Japanese crystal spheres, 



cost of 373-375 



cutting of 270-274 



size of 374-375 



use of 367-369 



weight of 376 



Jefferisite 77 



"Jumbo" 223 



Jupiter 251 



Jurassic fossils 19 



Kerolite 239 



Kyanite 75, 233 



Laccolite elevation in San 



Juan Mountains 129 



Latitude, determination of. . . . 235 



Laurentian rocks 216 



Lavoesium 200 



Leaf-impressions in " Amboy " 



clays 136 



Lecture experiment 214-315 



Leopardite 322 



Lepidolite 80 



LePlongeon, Dr., discoveries 



in Yucatan 173. 175, 178 



Librarv of Academy. 1. 30. 164. 283 

 Life of Mu. Thomas Bland.39, 378 



of Dr. a. C. Post 380 



Light, electric. 97-103 



Lignite 330 



in " Amboy " clays 136 



Limestones 333 



at Natural Bridge 218 



beneath Trias of New Jer- 

 sey . . 19 



in San Juan Moutains. 



135, 136 



overlying "Dakota" 133 



stains and decay in 63 



Limonite 339, 330 



Liquefaction of gases 190-191 



Literature, astronomical. . .261-263 

 Locomotive, capacity of, 



144, 145. 153 



combustion in 144-146 



development of 138-143 



fuel necessary in. .144-146, 150 



speed of 143-144 



weight of 145, 153 



Longitude. . 235 



Lower Silurian strata 216 



Lowest temperature , 191 



Luminiferous ether 77 



Luray caverns 217 



