INDEX. 



647 



North America, distribution of ferns in, 

 372. 

 batrachia and reptilia of, 

 343. 

 North American alga?, 363. 

 mice, 33S. 

 Norway, ash-showers in, 93. 



climate of the west coast of, 81. 

 discovery of nickel in, 237. 

 falling of atmospheric dust in, 241. 

 fish-guano of, 3S5. 

 Nourse, Prof. J. E., ccxlix. 

 November meteorites, 45. 

 Noyes, Mr. , 410. 

 Nu Scorpii, 6. 



O. 



Oates, Frank, 594. 



Observation of variable stars, 59. 



Observatory at Bogota, xxi. 



at Gettysburg, xxii. 

 at Melbourne, xxii. 

 at Moscow, xxii. 

 at Quito, xxi. 

 at Trevandrum, xxxiv. 

 at Twickenham, xxii. 

 of the Argentine Confedera- 

 tion, xxi. 

 Ocean and its depths, the, cxv., cxviii. 

 currents, circulation of, 71. 



origin of, 71. 

 physics, new generalization of, 12. 

 vertical distribution of tempera- 

 ture, 75. 

 Oceanica, clxix. 



Ocular, fluorescent, for spectroscope, 138. 

 Ohio, fossils from the coal-measures of, 

 30S. 

 valley caverns, 309. 

 Ohm's law, 127. 

 Oil from the carapa-tree, 534. 

 Oil-lamp for photography, 517. 



-plants remove acid from soil, 3S0. 

 Olbers, Mr., 24. 

 Onimus, Mr., 316. 



Opacity of photographic images, 140. 

 Operations of the United States Fish 



Commission in 1S75, 429. 

 Ophiuchi (70), double star, 8. 

 Oppolzer, Mr., 49. 



Optical phenomena at the transit of Ve- 

 nus, 142. 

 Optics, lix. 



Orange-trees, disease of, ccxi. 

 Orbit of a double star, 8. 



of Mu Bootis, S. 

 Ord, Major-General E. O. C, 296. 

 Ore separator, magnetic, 462. 

 Ore', Mr., 563. 



Organ pipes, action of, 131. 

 Organic character of eozoon, 309. 

 chemistry, lxxxii. 

 substance in the plant, 370. 

 tissues, 306. 

 Origin of aerolites, 21. 



of animal forms, 305. 

 of man, clxxi. 

 of ocean currents, 71. 

 of the horns of the deer, 335. 

 Ornament for rooms, 457. 

 Orton, J. & Hartt, C. F., Messrs., clxxxii. 

 Orum, Mr. M., cclxxviii. 

 Osborn, Admiral Sherrard, 594. 

 Osier, Dr., cxli. 



Ossler anemometer, 109. 



Ostensackeu, Baron, 573. 



Ostruthiu, a new vegetable principle, 371. 



Owen, Mr. W. Cunliffe, 5SS. 



Prof., ccv., 337. 

 Oxford Observatory, new, xxi. 

 Oxygen, absorption of, by plants in the 

 dark, 365. 

 and air for divers, 470. 

 Oyster, development of the, clxxxi. 

 Oyster-culture, French, 420. 

 Oysters in France, growth of, 439. 

 Ozone, cclxxxii. 



decolorizing properties of, 215. 



in the Libyan desert, 208. 



P. 



Packard and Emerton, Messrs., cxc. 



Dr., clxxviii., clxxxi., cxciii., 573. 

 Page, Mr. George Shepard, 412. 

 Pain, Mr. H. G., clxix. 

 Paint as an engineering material, 531. 

 Pai-Utes, stone knives with handles from 



the, 326. 

 Palestine explorations, cxxviii. 

 Palissa, Mr., 33. 

 Palmer, Dr. Edward, cxxvi., ccxvii., ccxix. 



Mr. A., 411. 

 Palolo worm, the, 359. 

 " Pandora," the, cxx. 

 Pape,Mr.,25, 26. 

 Paper from wild rice plant, 512. 

 Gaudin's polishing, 538. 

 glazing by parafliii, 544. 

 industrial employment, cclxxiii. 

 Paquelin & Jolly, Messrs., 227. 

 Paquet, Mr., xlvii. 

 Paraffin for glazing-paper, 544. 



for preserving eggs, 456. 

 Parallax of the sun, 14S. 



solar, xxvi. 

 Paris, importation of the gonram i into, 420. 



standard time for, xxii. 

 Parry, Dr. C. C, 249. 

 Paste for photographs, 523. 

 Pasteur's process with wine, etc., 450. 

 Pate sur pate for porcelain, 521. 

 Patent cooling apparatus, 450. 

 Patents, index from 1790 to 1S73, 579. 

 Patina on bronze, 521. 

 Patterson, Capt. C. P., ccxlix. 

 Paulet, Mr., cclxxxvi. 

 Pavlosk, new observatory at, xxxvi. 

 Paynter, Eear-Admiral, 504. 

 Peabody Museum, eighth report of the, 



cliii., 5S9. 

 Peale, Dr., 205, 272,573. 

 Pease, Charles, 595. 

 Peaucellier cells, 4. 

 Pebal, Mr., lxxvi. 

 Peligot, Mr., 92. 

 Penaud, Mr., 501, 502. 

 Pendulum, application of the horizontal, 

 174. 

 with a fluid in its spherical 

 bob, 177. 

 Pengelly, Mr. W., F.R.S., clvi. 

 Pennington, Mr. Brooke, clvii. 

 Pennsylvania Commissioners of Fisheries' 

 Report, 409. 

 gas wells, 247. 

 Penny, Mr., 73. 

 Periodicity of hail-storms, 116. 



of moisture in Russia, 108. 



