PROCEEDINGS, VOLS. 1-50 PHOSPHORIC-PLATY 



Phosphoric acid, in agriculture, 8, 



378. 

 Phosphorogenic emanation, 3, ^8. 

 Phosphorus, allotropic modification 



of, 14, 108. 

 Photodynamics, 19, 203,262,354,446. 



567; 20, 235, 237, 406, 476, 566, 



638; 21, 120, 590. 

 Photogrammetry, civil and mihtary, 



30, 229. 

 Photographic rays, invisible, 3, 179. 

 Photographs, Siamese, 10, 201. 

 Photography, 9, 281, ^72. 



— astronomical, pertaining to work 

 ■with a portrait lens, 46, 417. 



— by a lightning flash, 23, 257. 



— composite, 22, 360. 



— , — , applied to handwriting, 23, 433. 

 Photo-lithography, 9, 483. 

 Phyllocaridian, discover}^ of the 



thoracic feet in a Carboniferous, 



23, 380. 

 Phylogeny of an acquired character- 

 istic, 32, 349. 

 Physical geography of the United 



States, 16, 61. 

 Physics, organic, 12, 311. 

 Physostomi fossil, 12, 52. 

 Pickering, Edward C, international 



Southern telescope, 45, 33. 

 Pieri-nymphalidae, specializations of 



the Lepidopterous wing, 37, 17. 

 Pierids, descent of the, 39, 4. 

 Pierres a eceuilles en Europe, 17, 



714. 

 Pigeon, vivisection of the brain of a, 



17, 3U- 



Piggot A, S.. Colombian guano, 6, 



189. 

 Pine Grove coal, 2, 229. 

 Pipes, iron, transmission of sound 



through, 5, 118. 

 Plagopterinas and Ichthyology of 



Utah, 14, 129. 

 Plane grating, adjustment for, similar 



to Rowland's, 48, 166. 



Planet, name of, in Babylon, 47, 141. 



— unknown, prediction of 13, 237. 

 Planetary mass, correlations of, 13, 



239- 



— node between Mercury and Vul- 

 can, 13, 252. 



— series, comparison of, 13, 471. 

 Planeto-taxis, 13, 143. 



Planets, determination of the general 

 perturbation of the minor, 31, 124. 



— existence of, about the fixed stars, 

 49, -'22. 



— intra-asteroidal, rotation of the, 

 13, 145- 



— nebulous, stability of, 22, 104. 

 — -origin of the, 19, 15. 



— primary, analogy of periods of ro- 

 tation of, 5, 97. 



Plant-breeding, forward movement 

 in, 42, 54- 



— kingdom, most primitive living 

 representative of the ancestors of 

 the, 47, 91. 



Plants, Arctic, 6, 186. 



— influence of sea water on distri- 

 bution of, 50, 457. 



— new crystalline compounds in 

 higher, 25, 124. 



— ■ North Carolina Triassic, found in 

 Bucks County, Pa., 19, 16. 



— odor and temperature in, 10, 354. 



— sand dune, of Bermuda, compara- 

 tive leaf structure of the, 47, 97. 



— ■ Silurian land, in Ohio, 17, 163. 



— west of Mississippi, geographical 

 distribution of, 10, 315. 



Platinum, 2, 196. 



— -new compound of, i, 94. 



Piatt, Franklin, character of some 

 Sullivan County coals, 18, 186. 



— • — and R. H. Sanders, section of 

 Palaeozoic rocks, Blair County, 

 Pa., 17, 349. 



Platyceras, attachment of, to Palse- 

 ocrinoids, and its effects in modi- 

 fying form of the shell, 25, 231. 



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