34 ° 
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." (Leyvis). 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 tion 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 Stabs and Mexico ” 
(Newberry) 288 
“On the Constitution of the Tartrates 
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” 
(Peirce) 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) 112 
“ On the Measurement of 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. 
H. 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 ” (Meehan) - . 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 Dr. Chapman's 
Paper on the. E. C. Spitzka 329 
Orang Outang, On the Structure of 
the 302, 322 
Orang Outang, The Brain of the. 25, 326, 329 
Ores, Chloride, The Reduction of 119 
Ores, Iron, of the Brandon Period 164 
Ores, Iron, the Genesis of Certain 209 
Organic Forms, The Distribution of, on 
the Globe 234 
Organic Matter in Potable Water 20 
Organisms in Beet Sap 12 
“ Origin and Nature of Intellectual 
Property ” (Shaler) 80 
“Origin and Succession of Felidre ” 
(Cope) 112 
“ Origin of Species, Coming of Age of 
. the 15 
Orionis, ) 3 Rigel) 191 
Orionis, y. 191 
Orionis, f) 295 
Orionis, t and c 283 
Orionis, 1 and a 152 
Orion, Photograph of the Nebula in ... . 223 
Orion, The Great Nebula in 295 
Omithotarsus 322 
Orthoceras (Subulatum?) 190 
Orthonectidce 97 
Orthoptera, Organ of Smell in 320 
Orthosira marina 222 
Otto Lang Gas Engine, The Cost of 
the, per hour 84 
Oxygen, The Mean Ratio of, toNitiogen 
in the Atmosphere 166 
Oysters as Food 68 
Ozone, Occurrence of, on Evaporation 
of Different Liquids 197 
Pirr/il 'ma : 72 
Pachyma cocos 262 
Pagomysfatidus 87, 215 
PaltechinidcE 144, 147 
Palaeontological and Biological Devel- 
opment. Alexander Agassiz 142 
Palaeontological Researches. Henry S. 
Williams (I) 190 
Palaopneustes 144 
Palae zcic Period, on Land Snails of the 136 
Palis a 317 
Palisander Wood, Resin of 188 
Palladium, Polarized, Experiments wiih. 11 
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 
Peckhanute, Analysis of, (Smith) 92 
Pecten fenestratus 235 
Peculiarly, Remarkable, of an Anthro- 
poid Brain 25 
P edicularis 87, 217 
Peerages for Scientists 153 
Pegasi, k 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 superciliosus 65 
Perches, Bird, and Stands 61 
Perforation of Zinc Cisterns and Corro- 
sion of Lead Pipes by Water 296 
Peripatus 97 
Peripneustis 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 
Permanganate 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 
Petalosticha 144. 145, 147 
Petroleum, Products Contained in the 
Coke of 307 
Phadra , When Discovered. . . 283, 305, 318 
“ Pharyngeal Respiration " (Garland). . 81 
Philine amabilis 235 
Phocabarbata 215, 216 
“ Phonogram," The 24 
Phonograph, The 139 
Phonometer, Parolette's 287 
Phormosoma 144 
Phosphorence of the Sea 51 
3°4 
94 
222 
222 
233 
23S 
Phosphorescent Lighting 224 
Phosphoric Acid, Manufacture ol 307 
Phosphorous Proto-chloride, Compound 
of, and Titanium Tetra-chloride. . . 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 
Photography, Instantaneous, en ballon. 
Pho turns Pennsylvania 
Phot urns py rails 
Phylloxera 
Phylloxera Congress, The, in Spain . 
Phylloxera , Sulphide of Carbon and 
Sulpho-carb nate of Potassium 
against 47 
Phylloxera, The Winged 94 
Physa 154 
Physa heterostropha 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 . I. Romanes 64 
Picric Acid, Detection of, in Beer 296 
Picus minor 24 
Pier is napi 32 
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 Nebulas, New 136 
Planets Discovered by Prof. J. C. Wat- 
son 305 
Plan of the Cerebro-Spmal Nervous 
System. S. V. Clevenger. . 112, 134, 235 
Planorbis levis 138 
Planorbis, Transformation of, (1)138, (II) 196 
Plants, Fossil, on Mazon Creek, Preser- 
vation of 163 
Plants, Insectivorous 117 
“ Plaster of Paris as an Injecting Mass” 
(Gage) 3*9 
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 
Plethysmograph, The 115 
Pleurosigma elongatum 29 
PleurosigmcE, Quick Method of Securing 10 
Pleurosigma Virgin ica 222 
Pleurotoma Agassizii 235 
Pleurotoma Carpenteri 235 
“Podura” 26 
Poisonous Product, A, of Fermented 
Indian Corn 235 
“ Poissons Fossiles” (Agassiz). 142 
Polar Electricity in the Hemihedral 
Crystals with Inclined Surfaces.... 260 
Polaris 274 
Pollination of Yucca, Notes on 136 
Polychrome Printing 24 
Polyommatus phlccas 32 
Polyphylla dccemlineata 4 ° 
Poiyzoa, The 63 
Psrocidaris 14S 
Portugal, Prehistoric Archaeology of. . . 77 
Potamogetons 3°6 
Potash, Permanganate of, Use of, to 
Determine the Organic Matter in 
Water 21 
