Patricius, St., his accurate conjectures on the hot springs of Carthage,
223, 224.
Peltier on the actual source of atmospheric electricity, 335, 336.
Pendulum, its scientific uses, 44; experiments with, 64, 166, 169, 170;
employed to investigate the curvature of the earth's surface, 165; local
attraction, its influence on the pendulum, and geognostic knowledge deduced
from, 44, 45, 167, 168; experiments of Bessel, 64.
Pentland, his measurements of the Andes, 28.
Percy, Dr., on minerals artifically produced. See note by Translator, 268.
Permian system of Murchison, 277.
Perouse, La, expedition of, 186.
Persia, great comet seen in (1608), 139, 140.
Pertz on the large aerolite that fell in the bed of the River Narni, 116.
Peters, Dr., velocity of stones projected from Aetna, 122.
Peucati, Count Mazari, partial infection of calcareous beds by the contact
of syenitic granite in the Tyrol, 262.
Phillips on the temperature of a coalmine at increasing depths, 174.
Philolaus, his astronomical studies, 65; his fragmentary writings, 68-71.
Philosophy of nature, first germ, 37.
Phosphorescence of the sea in the torrid zones, 202.
Physics, their limits, 50; influence of physical science on the wealth and
prosperity of nations, 53; province of physical science, 59; distinction
betweeen the physical 'history' and physical 'description' of the world, 71,
72; physical science, characteristics of its modern progress, 81.
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