Oersted, electro-magnetic discoveries, 188, 191.
Olbers, comets, 104, 109; aerolites, 114, 118; on their planetary velocity,
121; on the supposed phenomena of ascending shooting stars, 123; their
periodic return in August, 125; November stream, 126; prediction of a
brilliant fall of shooting stars in Nov., 1867, 127; absence of fossil
meteoric stones in secondary and tertiary formations, 131; zodiacal light,
its vibration through the tails of comets, 143; on the transparency of
celestial space, 152.
Olmsted, Denison of New Haven, Connecticut, observations of aerolites, 113,
118, 119, 124.
Oltmanns, Herr, observed continuously with Humboldt, at Berlin, the
movements of the declination needle, 190, 191.
Ovid, his description of the volcanic Hill of Methone, 240.
Oviedo describes the weed of the Gulf Stream as Praderias de yerva (sea weed
meadows), 308.
Palaeontology, 270-284.
Pallas, meteoric iron, 131.
Palmer, New Haven, Connecticut, on the prodigious swarm of shooting stars,
Nov. 12 and 13, 1833, 124; on the non-appearance in certain years of the
August and November fall of aerolites, 129.
Parallaxes of fixed stars, 88, 89; of the solar system, 145, 146.
Perry, Capt., on Auroras, their connection with magnetic perturbations, 197,
201; whether attended with any sound, 200; seen to continue throughout the
day, 197; barometric observation at Port Bowen, 314, 315; rarity of electric
explosions in northern regions, 337.
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