340 



Index. 



" On Condensers for Currents of High 



Potential " (Barker) 288 



On Currents Produced by Friction be- 

 tween Conducting Substances, and 

 on a New Form of Telephone Re- 

 ceiver. James Blythe 119 



" On Dendrites " (Lewis) 332 



Oneonta and Montrose Sandstones of 

 Vanuxem, Note upon the Relations 

 of the 290 



"On Large Sphene from Canada" 



(Foote).... 332 



Onosmodium Virginianum 264 



" On Philadelphite, Sp. Nov." (Lewis). 332 



On Photographing the Nebula in Orion. 



Henry Draper 304 



" On Photographing the Spectra of the 



Stars and Planets " (Draper) 83 



" On Randite " (Rand) 332 



" On Serpentine in Bucks Co., Pa." 

 (Lewis) 332 



" On Siderophyllite, a New Mineral" 



(Lewis) 332 



On Some Causes which Hinder or Fa- 

 cilitate the Precipit lion of Man- 

 ganese Hydrate bv Ammonia 296 



" On the Bryn Mawr Gravel " (Lewis). 332 



" On the Cavities and Fluidal Inclu- 

 sions found in Certain Varieties of 

 Quartz." (Sorby) 289 



" On the Conglomerate Ore Deposits 

 of the United States and Mexico " 

 (Newberry) 288 



"On the Constitution of theTartiates 

 of Antimony " (Clarke) 112 



" On the Development of Limna minor" 



(Barbeck) 332 



" On the Discovery of the Inflammable 



Gas from Coals " (Webster) 275 



" On the Elhpticity of the Earth as De- 

 duced from Pendulum Experiments" 

 (Ptirce) 288 



" On the History of Forces" (Akin) . . . 203 



" On the Identity of the Ascending Pro- 

 cess of the Astragalus in Birds with 

 the Intermedium " (Morse) 322 



" On the Limits of Visibility with the 

 Microscope " (Dolbear) 1 12 



" On the Measurementof Plane Angle " 

 (Lewis) 332 



" On the Necessity for a New Depar- 

 ture in Spectrum Analysis" (Lock- 

 yer) 27 



" On the Nervous System " (Shawl .... 228 



On the Origin of An'hracite. T. Sterry 



Hunt 303 



" On the Origin of the Coral Reefs of 

 the Yucatan and Florida Banks" 



( Agassiz) 288 



' On the Musical Pitch at Present in 

 Use in Boston and Vicinity " (Cross 

 and Miller) 112 



" On the Refractive Index of Metallic 

 Silver" (Wright) - in 



" On the Specific Refraction and Disper- 

 sion of Isomeric Bodies" (Glad- 

 stone) 307 



" On the Star List of Abul Hassan " 



(Peters) 288 



On the Structure of the Orang Outang. 



11. C. Chapman. 302, 322, 326, 329, 332 



On the Superficial Viscidity of Liquids. 

 J. Plateau. (Translated by the Mar- 

 chioness Clara Lanza) 298 



" On the Timber Line of High Moun- 

 tains " (Median) 332 



Ontology, Definition of 312 



Opaque Objects, A New Cell for 209 



Opaque Objects, Method of Mounting. 305 



Optical Properties. The, of Mixtures of 



Isomorphous Salts 188 



Orang Outang, On I)r. Chapman's 

 Paper on the. K. ( .'. Spitzka 329 



Orang Outang, On the Structure of 



the 302, 322 



Outang, The Brain of the. 25, 326, 329 



• hloinle, The Reduction of 119 



Bi andon P< riod 164 



Ores, Iron, l 1 1 tain 209 



ic Forms, The Distribution of, on 

 the (.lobe 234 



Organic Matter in Potable Water 20 



Organisms in Beet Sap 12 



" Origin and Nature of Intellectual 



Property " (Shaler) 80 



"Origin and Succession of Felida; " 



(Cope) 112 



" Origin of Species, Coming of Age of 



the 15 



Ononis, /3Rigel) 191 



Ononis, ^ 191 



Ononis, 295 



Ononis, L and c 283 



Ononis, 1 and a 152 



Orion, Photograph of the Nebula in ... . 223 



Orion, The Great Nebula in 295 



Omithotarsus 322 



Orthoceras (Subulatum ?) 190 



Ortkoncctidcs 97 



Orthoptera, Organ of Smell in 320 



Orthosira marina 222 



Otto Lang Gas Ei gine, The Cost of 



the, per hour 84 



Oxygen, The Mean Ratio of, to Niti ogen 



in the Atmosphere 166 



Oysters as Food 68 



Ozone, Occurrence of, on Evaporation 



of Different Liquids 197 



Pachyma 72 



Pachvma cocos 262 



Pagomys fa-tidus 87, 215 



Pahrchinida 144, 147 



Palasontological and Biological Devel- 

 opment. Alexander Agassiz 142 



Palasontological Researches. Henry S. 



Williams (I) 190 



Palaopneustes 144 



Palae. zoic Period, on Land Snails of the 136 



Palisa 317 



Palisander Wood, Resin of 188 



Palladium, Polarized, Experiments with, n 



Papilii Ajax 32 



" Parallax of a Centauri" (Elkin) 259 



Paris Observatory 102, 200, 295 



Pasimachus punctatus 38 



Patent Laws, On, As a Means for the 

 Advancement of Science. B. S. He- 



drick 166 



Peckhamite, Analysis of, (Smith) 92 



Pecten fenestratus 235 



Peculiarity, Remarkable, of an Anthro- 

 poid Brain 25 



Vedicularis 87, 217 



Peerages for Scientists 153 



Pegasi, n 223 



Pelomyxa palustris 176 



"Penetration of Objectives: Is it a De- 

 fect or an Advantage " (Vorce) 160 



Pentacrini 147 



Pentrimitis 19 



Peraceras malacorhinus 65 



Peraceras supcrciliosus 65 



Perches, Bird, and Stands 61 



Perforation of Zinc Cisterns and Corro- 

 sion of Lead Pipes by Water 296 



Peripatus 97 



Penpneustis 146 



Perkins System, Mr. Bramwell on the.. 95 

 " Permanent Microscopical Prepara- 

 tions of Amphibian Blood " (Gage) 



112, 319 

 " Permanent Microscopical Prepara- 

 tions of Plasmodium" (Gage).. 112, 319 



mganate of Potash, Use of, to De- 

 termine Organic Matter in Water. . 21 



Perseids, The August, 1880 153 



Personal Danger Connected with Elec- 

 tric Lighting 314 



Petalosticka 144. 145, 147 



Petroleum, Products Contained in the 



Coke of 307 



Phadra, When Discovered... 283,305,318 

 '■ Pharyngeal Respiration" (Garland).. 81 



Philint amabilis 235 



barbata 215, 216 



" Phonogram," The 24 



Phonograph, The 139 



Phonometer, Parolette's 287 



Phormosoma 144 



l'hosphorence of the Sea 51 



Phosphorescent Lighting 224 



Phosphoric Acid, Manufacture o! 307 



Phosphorous Proto-chloride, Compound 



of, and Titanium Tetra-chlcride. . . 307 

 Photophone, Application of the, to the 

 Study of the Noises Taking Place 



on the Surface of the Sun 304 



Photophone, Lecture 304 



Photophone, The. Alexander G. Bell. . 130 

 Photophone, The Bell... 112, 121, 130, 

 177, 320. 



Photographic Images, Inversion in 108 



Photograph, On a, of Jupiter's Spectrum, 

 Showing Evidence of Intrinsic Light 

 from that Planet. Henry Draper. . 83 

 Photograph, On a, of the Nebula in 



Orion 304 



Photography, Instantaneous, en ballon. . 94 



Phot urns Pcnnsylvanica 222 



Photurns pyralis 222 



Phylloxera 235 



Phylloxera Congress, The, in Spain. . . 235 

 Phylloxera, Sulphide of Carbon and 

 Sulpho-carb- nate of Potassium 



against 47 



Phylloxera, The Winged 94 



Physa 154 



Physa hcterostropha 305 



Physical Nomenclature, Some Needed 



Changes in, and Additions to 238 



Physico-Chemical Analysis of Soils.... 320 



Physics, Definition of 238 



" Physiological Botany" (Goodale) 79 



Physiology of the Fresh-water Medusa. 



George .7 . Romanes 64 



Picric Acid, Detection of, in Beer 296 



Picus minor 24 



Pieris napi 3 2 



Pile, A New Electric (Revnier) 84, 91 



Pilosity as a Teratologieal Phenomenon. 318 



Pilosity, Physiological 318 



Pinguicula 264, 265 



Pinus 19 



Pitcher Plant, The 266 



Planetary Nebulae, New 136 



Planets Discovered by Prof. J. C. Wat- 

 son 305 



Plan of the Cerebro-Spinal Nervous 



System. S. V. Clevenger. .112, 134, 235 



Planorbis levis 138 



Planorbis, Transformation of, (I) 138, (II) 196 

 Plants, Fossil, on Mazon Creek, Preser- 

 vation of 163 



Plants, Insectivorous 117 



" Plaster of Paris as an Injecting Mass" 



(Gage) 319 



Platinum and Palladium, Polarized, Ex- 

 periments with 11 



Platinum, Chloride of 12 



Platinum, Electrified, Adhesive Power 



of 84 



Platinum, Occurrence of 227 



Platinum, The Sulpho-cyanide of, of V. 



Marcagno 188 



Plea for the Metric System in Micros- 

 copy. R. H. Ward 52, 225 



Plebeius agestis 32 



Pleiades 152, 283 



Pleiades, Nebula in the 9 



Plethysmography The 115 



Pleurpsigma elongatum 29 



Pleurostgma, Quick Method of Securing 10 



Pleurosigma I 'irginica 222 



Pleutotoma Agassizii 235 



Plettrotoma ( arpenteri 235 



" I'odura " 26 



Poisonous Product, A, of Fermented 



Indian Corn 235 



" Poissons Fossiles" (Agassiz) 142 



Polar EUctricity in the Hcniiliedr.il 



Crystals with Inclined Surfaces.... 260 



Polaris 274 



Pollination of Yucca, Notes on 13b 



Polychrome Printing 24 



Polyommatus phlouts 32 



Polyphylla decemlineata 40 



Polyzoa, The 63 



'arii 145 



1, Prehistoric Archaeology of... 77 



Potamogetons 306 



Potash, Permanganate of, Use of, to 

 Determine the ' irganic Matter in 

 Water 21 



