33 6 
Index. 
Diadcmatid<e 143, 147 
Diadcmopsidce 14b 
Diamonds, Artificial ... 12 
Diaphana (Ulriculus) gemma 235 
Diaphote, The 14 
Diastase, Action of 12 
Diatomaceoe, Quick Way of Securing. 10 
Diatomacese vs. Desmidiaceae 7 
Diatomaceous Earth, The Richmond.. 222 
Diatoms, Belgian, A Synopsis of 23 
Dicyetnida 97 
Didymoprium 56 
“ Differential Calculus " (Byerly) .... 79 
Difflugia constricta 56 
Difflugia corona 56 
Difflugia lobostoma 56 
Difflugia pyriformis 56 
Diffraction, Simple Method of Observ- 
ing 319 
Diffusion, The, and the Physiological 
Condition of Copper in the Human 
System 319 
Digestion, Nature of 114 
Dilatation and Compressibility of Gases 
under Strong Piessure 247 
“ Dimensions ot the Brain and Spinal 
Cord in Some Extinct Reptiles " 
(Marsh) 288 
“Dimorphic Flowers in Houstonia ” 
(Meehan) 332 
Dinamccba mirabilis 56 
Dionaa muscipula 21 
Dione, When Discovered 283 
Diplocidaris 143 
Diplofihrys Archeri 56 
Diptera, Organ of Small in 320 
Discina lodensis 190 
Discina truncata 190 
Discoidea 144 
“Discoveries in the Mammoth, Wyan- 
dot, and Luray Caves, 1 ' (Hovey). . . 112 
Discoveries Near Este, Italy 6 
" Discussion of the Phenomena, observ- 
ed in Comparing the Spectrum of 
the Light from the Limbs with that 
of the Centre of the Solar Disk,” 
(Hastings) hi 
“ Diseases Caused by Fungi,” (Farlow) 81 
“ Distinguishing Species of Populus 
and Juglans by the Young Naked 
Branches,” (Beal) 112 
Distribution of the Human Race, Geo- 
logical and Geographical 19 
Distribution, The, of Time. Leonard 
Waldo 277 
“D-hnes” Spectra; Are they Due to 
Water? W. A. Ross 48 
Doris complanata 235 
Dorocidaris 145 
Do Sharks Swallow their Young? Burt 
G. Wilder 236 
Double Stars, Observation of 165 
Dredging Cruise, Report of the, of the 
U. S. Steamer, Blake , During the 
Summer of 1880-. 314 
Dreyer's Astronomical Record 77 
Drosera longifolia 264, 265 
Drosophyllum 265 
Dry “Mounts” for the Microscope, 
H. L. Smith (1)26, (II) 74 
Dry Mounts, Method of Preparing 264 
Dualistic Realism 312 
Duration, The, of the Arctic Winter. F. 
Schwatk’a 314 
Dyes, Aniline and Madder 62 
Dynamo-Electric Current, and on Cer- 
tain Means to Improve its Steadiness 22 
Dynamo-Machines 170 
Dysasterida 145 
Dyschirius globulosus 40 
Earth’s Figure, Secular Changes in the. 83 
Earth, Inductive Action of, on the Moon 247 
Earthquakes and Volcanic Phenomena. 19 
Earthquakes, Annual Statistics of 19 
Earth, The, as a Conductor of Electric- 
ity 108 
Eccentricity of the Earth’s Orbit 96 
Echinanthida 144, 147 
Echinanthus 145 
Echinarachnius 145 
Echini 147, 148 
EchinidcB 147 
Echini, Extinct 142 
Echinobrissus 146, 148 
Echinocardium 145 
Echinoconida 144, 147 
Echinocyamus 144, 145 
Echinodermata 97 
Echinolampus 145 
Echinometra 145 
Echinometradcc 143. 147 
Echinoneida .•. . 144 
Echinoneus 145 
Echinothuria 144, 147 
Echinus 145 
Edison Light, The 18 
Edison’s Electro Dynamo-Machine.... 102 
Edison’s Laboratory 101 
Edison’s Telephone 11 
Eels, Eggs of 10 
Effect of Age on the Quality of Iron. . 224 
“ Effects of Certain Drugs in Increasing 
or Diminishing Red Blood Corpus- 
cles," (Cutter) 81 
“ Effects of the Respiratory movements 
on the Pulmonary Circulation” 
(Bowditch) 81 
Effect, upon Crops, of Carbonic Acid 
Gas in the Air 12 
Eggs of Eels 10 
Eggs of the Extinct Great Auk 69 
“ Elasmobranch Fishes” (Foster) 97 
Electra 9 
Electrical Blowpipe of M. Jamin 328 
“ Electrical Conductibility of Gases,” 
(Hittorf) 58 
Electrical Expansion, Laws of 120 
Electrical Furnace, Dr. Siemens’ 315 
Electrical Indicator, for Steam Boilers. 96 
Electrical Insects 5 
Electrical Railroads 5 
Electric Illumination 153 
Electricity, Atmospheric 91 
Electricity as Power. Francis R. Upton.. 5 
Electricity, Origin of 1:3 
Electricity, Polar, Development of, by 
Pressure, in Hemihedral Crystals, . . 188 
Electricity, Polar, in the Hemihedral 
Crystals with Inclined Surfaces. . . 260 
Electricity, The Earth as a Conductor 
of 108 
Electricity, Transmission of Motion by. 11 
Electricity, Water Jets as a Source of. 84 
Electric Lamp, Edison’s 277 
Electric Lamp, New Form of, (Charles 
Stewart) II 
Electric Lamp of Foucault and Serrin. 45 
Electric Lamp of Mr. Swan 36 
Electric Lamp (Reynier) 91 
Electric Lamps of Lontin and Siemens. 45 
Electric Lamps of M. Tchikoleff 45 
Electric Light, Crucial Test of the, in 
London 51 
Electric Lighting, Personal Danger 
Connected with 314 
“Electric Light; Its Production and 
Use” (Urquhart) 72 
Electric Motors, their Durability and 
Actual Return in Work 102 
Electric Phenomenon, A Curious 72 
Electric Pile, A New, (Reynier) 84, 91 
Electrified Metals, Adhesion of the Sur- 
faces of 84 
Electro-Dynamics, (Law of Clausius).. 140 
Electro-Magnetic Rock Drill 320 
Electro-Motive Force of the Brush Dy- 
namo-Electric Machine. Henry 
Morton 304 
Electro-Motor, an Improved 170 
Electro-Motors : Their Power and Re- 
turn. J. Hospitalier 103 
“ Elementary Plane and Spherical Geo- 
metry ” (Wheeler) 77 
“ Elements of Embryology ” (Balfour). 97 
Eleodes pilosa 41 
Elephant Calf, Mode of Suckling of the. 10 
Elephant, Young Indian 322 
Elephas primigenius 202 
Education ot Young Astronomers. ..82, 102 
Embryological Development 142 
“ Embryologie desSalmonidee” (Vogt) 142 
Embryology 97 
Emmet County Meteorite, 1879. J- Law- 
rence Smith 9 
Empetrum nigrum 87 
Encephalic Anatomy, Contributions to. 73 
Encke's Comet 126, 258 
Encope 145 
Endocranium, The, and Maxillary Sus- 
pensorium of the Bee. George 
Macloskie 112, 136 
Energy, Nature of 118 
Energy, Radiant, Definition of 240 
Energy, Transformation of 116, 238 
English Channel, Geological Changes 
in the 36 
Enhydrocyon 303 
Enstatite in Peckhamite 92 
Epidemics and Contagious Diseases, 
Origin of 108 
“ Epidote in Molybdenite ” (LewL). . . . 332 
Ep it hernia 23 
“ Epizootic” Epidemic of 1880 177 
Epsom Mineral Water, The, of Missouri 285 
Equus 153 
Eridani, e 9 
Errors of Refraction in the Eyes of Mic- 
roscopists. John C. Morgan 8 
Eskars of Maine, The 151 
Esquimaux, The, of Cumberland Sound 
(I) 85, (II) 100, (III) 214 
Eteropneusta 97 
Ethnology, American 19 
Ethnology, American Archaeology and, 7 
Ethnology : Fragmentary Notes on the 
Eskimo of Cumberland Sound. Lud- 
wig Kumhen. . . (I) 85, (II) 100, (III) 214 
“ Ethnology of Africa, Illustrated by a 
large Manuscript Map ” (Bickmore) 112 
Ethyl Nitrate, Reduction of, by Alcohol. 307 
Ethyl Oxide, compound of, and Tita- 
nium Tetrachloride 307 
Eulogy on Joseph Henry. Alfred M. 
Mayer in, 127 
Euronome, When Discovered 283 
Evolution, Definition of 309, 310 
Evolution of Locomotives in America. . . 35 
“ Evolution of Parasitic Plants” (Mee- 
han) 112 
Evolution of Species 138 
“ Examination of Fodders ” (Storer) 81 
Exeter Sound 85 
Expense of Repairing a Submarine Ca- 
ble S3 
“ Experiments Concerning the Spirit of 
Coals" (Clayton) 275 
Experiments on the Strength of Yellow 
Pine. R. H. Thurston 175 
Experiments with Polarized Platinum 
and Palladium 11 
Experiment with Vapors 31 
paraday’s Observations on Silvering 
Glass 19 
Fasting (Dr. Tanner) 19 
Fatty Acids Contained in Oils, Method 
of Determining 271 
Fatty Matters, Purification and Refining 
of 188 
Fe. and Pt. in vacuo , Thermo-Electric 
Electro-Motive Power of. 150 
Feeling and Function as Factors in Hu- 
man Development. Lester F. Ward 210 
Felidae, Miocene 303 
Felis domestica, Cerebral Fissures of.. .4, 49 
Fermentation, Rapid Alcoholic 224 
Ferric Gallate and Ferric Oxalate, On a 
Solution of, as a Reagent for the 
Quantitative Analysis ot Ammonia. 180 
Fertilizer, Ammonium .Sulphate as a. . . 48 
Fibularia 144, 145, 147 
Field Work by Amateurs. Ellen Hardin 
Walworth 198 
Ftlariae in the proboscis of the Mosquito 10 
Fine Bolide, A. Edwin F. Sawyer 236 
Fire-Blight, The so-called, of the Pear, 
and the Twig-Blight of the Apple 
Tree 162 
