NICHOLS-OLIGOCENE 



GENERAL INDEX 



Nichols. M. Louise, spermatogenesis 

 of Oniscus asellus Linn., with 

 especial reference to the history of 

 the chromatin, 41, 77. 



Nicollett, J. N., astronomical obser- 

 vations, 2, 178. 



Map of tlie North West Terri- 

 tory and the geographical explora- 

 tion of the sources of the Missis- 

 sippi, 3, 140. 



Nicotin, antagonism between, and 

 strychnia, 16, 597. 



Nipher, Francis E., disruptive dis- 

 charges of electricity through 

 flames, 50, 397. 



— elimination of velocity effects in 

 measuring pressures in a fluid 

 stream, 45, -/-. 



— • — optical phenomenon, 50, 316. 



Nitrogen, sources of error in the de- 

 termination of the atomic weight 

 of, 43, 116. 



Noanama dialect of the Choco Stock, 

 35, 202. 



Noctua Linn., results obtained from 

 a search for the type of, 41, 4. 



Noctuidae, North American, 21, 134. 



Nodes, recession of cosmical, 11, 

 220. 



Nolinete, desert group, 50, 405. 



North Carolina auriferous gravels, 

 19, 477- 



— ■ — -fresh water fishes of, 11, 448. 



— • — Triassic plants found in Bucks 

 County, Pa., 19, 16. 



North-east boundary. 4, 53. 



North-west Territory and the sources 

 of the Mississippi, 3, 140. 



Northampton County, Pa., glacial 

 drift of, 18, 84. 



Norton, W. A., constitution and mode 

 of formation of the tails of comets, 

 3, io8. 



Nuclei in dust-free wet air, distribu- 

 tion of, 46, 70. 



Nukic, Ibrahim, 25, 183. 



Nulty, Eugenius, determination of 

 azimuths, 4, 234. 



— ■ — magic cyclovolute, 4, 125. 



Numerals, radical significance of, 10, 

 28. 



Numeration, octonary. and its appli- 

 cation to a system of weights and 

 measures, 24, 296. 



Nutritive processes, influence of men- 

 tal and muscular work on. 49, 145. 



Nuttall, Thomas, obituary notice of, 

 7, 297. 



Nyctinomus, on the genus, and de- 

 scription of two new species, 26, 

 558. 



Observatories, construction of, 4, 209. 



Occultations, Lunar, of the fixed 

 stars, I, 228. 



Ocean bars, methods of improving, 

 40, 62. 



Octonary numeration, 24, 296. 



Ocular phenomena. 4, 239. 



Oedogonium Huntii. 10, ■^,},i. 



Ogburn, John H., comparison of lati- 

 tude observations at Sayre Observa- 

 tory, South Bethlehem, and at 

 Flower Observatory. Philadelphia, 

 46, 165. 



Ohio, geology of western, 2, 120. 



Oil, adulterations in, 22, 296. 



— region, Pennsylvania, 10, 109. 



— springs of the West, 8, 262. 



— tanks, protection of. from light- 

 ning stroke, 19, 216. 



— use of, in storms at sea, 23, 383. 



— well levels in northwestern Pa., 

 16, 667. 



— — -records, 16, 3. 46, 429: 18, 9. 

 — ■ — -section, Hyner's, 17, 670. 

 -surveys for rectifying levels, 



railroad and, 17, 17. 



— wells at Brady's Bend, Pa., 12, 

 562. 



Oligoccne and Miocene deposits of 

 the Great Plains, 41, 113. 



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