Photometer, _X. de Maistre_, xxiv, 378.^f ----, new, _C. Daubeny_, xxxviii, 96.
Phrenology, notice of _Gall's_ and _Spurzheim's_ views, xxiii, 357. ----, _G. Combe's_ lectures on, in New Haven, xxxviii, 391. ----, remarks on, xxxix, 65.
Phyllites, fossil plants, generic characters of, vii, 182.
_Physick, P. S._, notice of, xxxviii, 155.
Physics, _N. Arnott's_ Elements of, noticed, xx, 155.
Physical Geography, effects of, on the boundaries of empires, _J. Finch_, xiv, 18.
Physiology, some of the principles of, _A. Fourcault_, xix, 391. ----, animal, xxiv, 382. ----, vegetable, xix, 393; xxiii, 138; xxxiii, 290.
_Pickering, C._, description of the Caligus americanus, xxxiv, 225.^f
_Pickering, J._, notice of life of _N. Bowditch_, xxxv, 386.
Pickeringite, analysis of, _A. A. Hayes_, xlvi, 360.
Picropharmacolite of Rügelsdorf, vii, 368.
Pictured rocks of Lake Superior, composition of, v, 220.
_Pierce, E._, on meteoric iron from Otsego Co., N. Y., xlvi, 402.
_Pierce, J._, native carbonate of magnesia on Staten Island, i, 142. ----, geology, mineralogy, scenery, &c. of the secondary region of a part of New York, New Jersey, and the adjacent regions, ii, 181. ----, on mineral waters, &c., iii, 235, 236. ----, on the geology, mineralogy, &c. of the Highlands of New York and New Jersey, v, 26. ----, geology, scenery, &c. of the Catskill Mountains, vi, 86. ----, notice of the alluvial district of New Jersey, with remarks on the marl, vi, 237. ----, an excursion among the White Mountains and up Mount Washington, viii, 172. ----, agriculture, geology, &c. of the Floridas, ix, 119. ----, topography, resources, &c. of Michigan, x, 304. ----, Virginia, shell marl and coal regions of, xi, 54. ----, mineral resources of Pennsylvania, xii, 54.
_Pierce, L._, notice of a halo, x, 369.^f
_Pierpont, J._, meteorological notes in 1692, xlii, 399.
Pigeons, flight of, in Ohio, _S. P. Hildreth_, xxiv, 134, 136; xl, 348. ----, roosts of, in Ohio, xl, 348. ----, mode of decoying, xvi, 373.
Pinite in Massachusetts, ix, 48. ---- (chlorophyllite) in Connecticut, vi, 219; xli, 354. ---- not at Bellows Falls, Vt., xi, 384.
Pink dye, from the flower of the sweet balm, xxv, 413.
Piperine, use of, _G. W. Carpenter_, xiii, 326. ----, notice of, _T. G. Clemson_, xviii, 352.