Index. 
34i 
Potassium Cyanide, Formula for Mak- 
Ulg 
"Potato Rot” (Farlow) 
“ Potsdam Sandstone near 
King 
of 
12 
8l 
Prussia” (Rand) 
332 
Pottery, Types of 
157 
Pourtalesice 
Practical Value of Science. 
T. 
H. 
144 
Huxley 3 
“ Prehistoric Altars of Whiteside 
County, Illinois.” (Holbrook) 112 
"Prehistoric and Early Types of Japan- 
ese Pottery.” (Morse) 112 
Preliminary Account of a Speculative 
and Practical Search for a Trans- 
Neptunian Planet. D. P. Todd... 167 
" Preliminary Determination of the 
Equation between the British Im- 
perial Standard Yard and the Metre 
of the Archives.” (Rogers) in 
Preparation of Ashes for the Extraction 
of Iodine from Sea Weeds 307 
"Preparation of Ranvier’s Piero-Car- 
mine. " (Gage) 319 
Preservation of Fossil Insects and Plants 
on Mazon Creek. J. W. Pike.. .ii2, 163 
Pressed Yeast 24 
Prionus Californicus 41 
Priority, The, of the late Friederich Mohr 
in Regard to the Principle of the 
Conservation of Energy. George 
W. Rachel 203 
Probable Variable Star 317 
Problems in Watson’s Co-ordinates. 
Thomas Hill 134 
“ Processes forDetermining the Organic 
Purity of Potable Waters.” (Tidy) 20 
Prodoxus cenescens 137 
Prodoxus cinerius 137 
Prodoxus intermedins 137 
Prodoxus marginatus 137 
Production of Crystals of Chromium 
Sesquichloride of a Persistent Green 
Color 260 
Products contained in the Coke of Pe- 
troleum 307 
Products of the Distillation of Colophon- 
ium 247 
“ Progress made at the Observatory of 
Harvard College in the Determina- 
tion of the Absolute Co-ordinates cf 
109 Fundamental Stars.” (Rogers) ill 
“ Progress of Geological Investigation 
in New Brunswick, 1870-1880." 
(Bailey) 112 
" Progress of Western Education in 
China and Siam.” (Gov’t Doc.) .. . 152 
" Prominence of Carbonate of Lime in 
Soil Water.” (Storer) 81 
Pronuba maculata 136, 137 
Propagation of Sound by Light, in 1811 287 
Proper Motion of the Group f 1 , Reti- 
culi; C Toucani; and £ Eridani. 
E. J. Stone 9 
“ Propositions in Cosmical Physics.” 
(Peirce) 79 
Prosdoscismi, Prof., Discoveries of, near 
Este, Italy 6 
Protein, Amount of, in Milk 12 
Protoplasm in Living Tissue 116, 117 
Protoplasm, Nature of 185, 248 
Prussian Blue, Crystalline 307 
Psammechinus 144 
Pseudo-diadematidcz 143 
Pseudo-Neuroptera, Organ of Smell in 
the 320 
Pseudo- Raphidetz 23 
Pt., in vacuo, Thermo-Electric Electro- 
Motive Power of 150 
Ptomaines in the Animal Body 179 
Ptyaline and Disastase, Action of 12 
Pulkowa Observatory 91, 124, 125 
Pulmonifera in Japan 154 
Punica granatum 307 
Pupa Bigsbii 136 
Pupa vetusta 136 
Purification and Refining of Fatty Mat- 
ters 188 
Pygasier 144 
Py gurus 146 
Pyrina 144 
“ Pyrology.” (Ross) 47,237,247 
Pyrology and Microscopical Chemistry. 
W. A. Ross 193 
Pyroxene 96 
Quarantine, Efficacy of 108 
Queckett Microscopical Club 10, 31 
Radiant Energy, On the Measurement 
of 288 
Radiant Matter 58 
Raia torpedo 5 
Railway Brake, An Electric 12 
Rain Containing Organic Debris 71 
Rain Waters, Ammoniacal Contents of 108 
Rana esculenta 233 
Rana temporaria 23s 
Rapid Alcoholic Fermentation 224 
Raphidcce 23 
" Recc rd of the Progress of Astronomy 
During the Year 1879.” (Dreyer). 91 
"Recurrence, The, of Certain Geologi- 
cal Phenomena in Geological 
Time,” (Ramsey) 172 
Redhouse Observatory 284 
Reduction, The, of Chloride Ores 119 
Reduction, The, of Ethyl Nitrate by 
Alcohol 307 
Reduvius serratus 5 
Refraction, Errors of, in the Eyes of 
Microscopists 8 
Regenerative Gas Furnace 313 
Relation of Vermont Archaeology to 
that of the Adjacent States. George 
H. Perkins 174 
Remarkable Instance of "Ascending 
Lightning” 247 
Remarkable Meteor, A 191 
Remarkable Peculiati'y of an Anthro- 
poid Brain. E. C. Spitzka 25 
" Remarks on Pond Life.” (Leidy).... 332 
Report of the Commissioner of Educa- 
tion, 1878 (extracts) 291 
Report of the Dredging Cruise of the 
U. S. Steamer Blake, During the 
Summer of 1880. Alexander Agas- 
siz 314 
“ Report of the United States Geol gi- 
cal Survey of the Terri ories ” 54 
"Report on the History of the Discovery 
of Neptune." (Gould) 167 
Reproduction, Modes of, in the Monads 57 
Repsolds & Son, Instruments of 166 
Reptiles, Anatomy of the Tongue in. . . . 234 
Researches on Basic Salts and Ata- 
camite 260 
Resin of Palisander Wood 188 
Respirative Power of Marsh and Water 
Plants 12 
“ Results of a Magnetic Survey of 
Missouri.” (Nipher) 112 
Reticuli, Cp 9 
Reversion in Floral Parts. William 
A. Buckhout 310 
Rhabdocidaris 143 148 
Rhinocerontidas, a New Genus of 65 
Rhizocarpecz 17 
" Rhizopods in the Mosses of the Sum- 
mit of Roan Mountain, N. C." 
(Leidy) 332 
Rhizopods, The Fresh Water, of North 
America 54 
Ricinus cotnmunis 264 
Richmond Diatomaceous Earth, The.. . 222 
Rise of the Zero-Point in Mercurial 
Thermometers 188 
Rissa tridactylus 215 
Rocks, Eruptive, The Structure of 173 
Rodentia, The, as Food 68 
Rolando, The Fissure of, in the Brain 
of the Orang 326 
Rosaniline, Constitution of the Salts of. 188 
"Rotary Powers of Glucose and Grape 
Sugar." (Wiley) 112 
Royal Astronomical Society. .83, 91, 96, 213 
Royal Botanical Society 44 
Royal Danish Academy of Sciences. . . . 166 
Royal Microscopical Society 29, 284 
Royal Observatory, Greenwich 154 
Royal Society, England. .10, 32, 47, 48, 331 
Royal Society of New South Wales. ... 71 
"Rude Argillite Implements" (Abbott). 112 
Ruhmkorff’s Bunsen Pile 92 
Ruhmkorff’s Coil 92 
" Rusty Gold ’’ 24 
S accharomyces 36 
Sacculina 63 
Saffron, Adulterations of 307 
Salenhz 147, 148 
Salmo salat 100 
Salts, Amounts uf, in Milk 12 
Salutatory 6 
Sandstones of the Catskill Mountains, 
Relations of the Oneonta and Mont- 
rose Sandstones to the 290 
San Francisco Microscopical Society. . 24 
Sarracenia variolaris 266 
Saturn 189, 263 
Sauranodon discus 322 
Saurian Footprints in the Ellangowan 
Colliery 89 
Sauropsida 251 
" Savage and Civilized Orthoepy.” 
(Ward) 286 
Scalaria Dalliana 235 
Scarites substriatus 40 
Schaerbele’s Comet 214 
Schizaster 146, 147 
Schmidt’s Hydraulic Motor, Cost of, 
per hour 84 
Schools of Science in the United States. 292 
Science, American Association for the 
Advancement of 42 
Science at Breakfast 75 
Science, Co-operation in 30 
Science, Definition of 311 
Science in France and Germany 311 
"Science Observer” 305 
Science, Practical Value of 3 
Science, Schools of, in the United States 291 
Science, The Advancement of 109 
Science, The Classification of (I) 311 
Sciences, The Mutual Interaction of the 82 
Scientific Journalists of Paris, Meeting 
of the 31 
Scientific Journals, The Value of 31 
Scientific Societies in Ameiica 30 
Sclerotium 72 
Scutellidce 144, 147 
Sea Urchins, Sea Anemones, and Sea 
Cucumbers as food 68 
Sea Water, The Action of, on Subma- 
rine Cables ^3 
Section Cutter, A New. (Burrill) 162 
Secular Changes in the Earth's Figure. 83 
Seismology 19 
Semnopithecus . 303 
Sentisection and Callisection 210 
" Serpentine Belts of Radnor Township, 
Delaware Co.” (Rand) 332 
Serrin’s Regulator 92 
Setigera 190 
“ Sexual Variations in Caslanea Ameri- 
cana.” (Martindale) 332 
Sharks, Do they Swallow their Young?. 236 
Shawano or Shawnee Indians, Notes on 
tho Identity and History of 202 
Shells of Glendower Pit 89 
Sibylla, When Discovered 283 
Siemens' Dynamo-Machine 170, 172 
Sigillaria 136 
Signal Service, The 249 
Sigsbee’s Gravitating Trap. Alexan- 
der Agassiz. ... 314 
Silver, Electrified, Adhesive Power of. . 84 
Silvering Glass, Faraday’s Observations 
on 19 
Silver, Occurrence of 227 
Simia Satyrus 302 
Simple Device. A, for Projecting the Vi- 
brations of Liquid Films without a 
Lens. H. S. Carh.irt 137 
Simple Method for Determining the 
Temporary Hardness of Water.... 331 
