ARVAL-AURORAL 



GENERAL IXDEX 



Arval Brethren, Etrusco-Libyan ele- 

 ments in the song of the, 30, 317. 

 Ashburner, Charles A., Bradford oil 



sand, 18, 419. 

 — — Bureau of ]^Iines, 20, 206. 



Colorado anthracite, 20, 205. 



-estimation of coal areas, 20, 



232. 

 -geological section at St. Clary's, 



Elk County, Pa., 19, T,yj. 

 Kintzes' firedamp indicator, 21, 



283. 

 measured section of Pennsyl- 



Paheozoic rocks, 16, 519. 

 Natural Bridge of Virginia. 21, 



699. 



obituary notice of, 28, 53. 



-oil well records in AlcKean and 



Elk Counties, Pa., 18, 9. 

 — - — Second Geological Survey of 



Pennsylvania, recent publication^ 



of, 22, 86. 

 spouting water well at Wilcox, 



Pa., 17, 127. 

 Ashes, fresh wood, influence of, on 



the growth of wheat, potatoes, &c., 



12. 323- 



Ashley, George H., Paleozoic area of 

 Arkansas south of the NovacuJite 

 Region. 36, 217. 



Ashmead, Albert S., testimony of the 

 Huacos (Mummy-grave) potteries 

 of old Peru, 42, 378. 



Asphalt, production of an. resem- 

 bling Gilsonite by the distillation of 

 a mi.xture of fish and wood. 37, 

 171. 



— West Virginia, 9, 183. 



Asphaltum in New Brunswick. 5, 241. 



Assay Balances, 9, 226. 



" Assembly Account," the First. Phil- 

 adelphia, 1748, 41, 260. 



Association, the dominating need of 

 man arid the keynote of social sci- 

 ence, 33, 134. 



Astaci, three extinct, from fresh 

 water territory of Idaho, 11, 605. 



Asteracanthus, 11, 440. 

 Asteroids between Mars and Jupiter, 

 mass of, II, 498. 



— mutual relations between the orbits 

 of certain, 30, 269. 



— origin of the zone of, and the 

 capture of satellites, 49, 35 r. 



— zone of, and the ring of Saturn, 

 21, 263. 



Astraea, observations on. 4, 347 

 Astrological manuscript in cipher, 



translation of, 13, 477. 

 Astronomical approximations. 18, 



380, 425 ; 19, 4, 18, 20. 



— observations, 2, 103. 



at Hudson Observatory, 2, 51. 



— -science, contributions to. 4, 216. 



illustrations of progress made 



during recent years in. 32, 97. 



Astrophyllite. Arfvedsonite and Zir- 

 con, from El Paso Co., Colorado, 



16, 509. 



Atalapha, new species of, 29, 5. 

 Atmospheric air, law of cooling of, 



3, i.SS- 

 — - physics and climatology, catalogue 



of works on. 32, 248. 

 Atom, constitution of. 50, 2>^6. 

 Atoms, chemical, 16, 505. 

 Atrypa, crural processes in genus. 



17, 337- 



Attaci, North American. 14, 256. 

 Attraction, heat and. 10, 97. 



— origin of force of. 14, iii. 

 Aurora of Sep. 3. 1839. i, 132. 



— -of February 7. 20. 21. 1866. 10, 

 206. 



— of April 15, 1869. II, III. 



— of April 10, 1872, spectroscopic 

 examination of. 12, 579. 



— of April 16-T7. 1882, 20, 283. 



— attitude of, above the earth's 

 surface, 10, 24; 37, 4. 



— at Cape Breton. 9, 60. 



— and earthquake, 11, 522. 

 Auroral and meteoric means, daily, 



12, 516. 



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