750 
Pumice, formation of, 201. 
in the Feejees, 346. 
floated to coral islands, 77. 
Pumiceous tufa of Madeira, 551. 
Pylstaart’s Island, 406. 
Pyramia, 695. 
Quoy and Gaymard, on limits of growing 
corals, in depth, 98. 
Radack Islands, 15, 410, 417, 421. 
Raiatea, 285, 304. 
Rains, confined to windward slopes, 27, 
159, 227. 
Raivavai, island of, 405. 
Ralick Islands, 15, 410, 417, 421. 
Raraka, island of, 48, 54, 73. 
Rarotonga, island of, 405. 
solid centre of, 364. 
Ranges of islands and mountains, laws re- 
specting, 414. 
Redfield, W. C., cause of deserts, 455. 
Reefs, see Coral. 
Refrigeration, effects of the earth’s, 428, 435. 
Revillagigedo Islands, 137. 
Xigaud, S. P., extent of land in the different 
zones in the Pacific, 9. 
Rio Negro, Northern Patagonia, remarks 
on, 607. 
Rivers of Chili, periodical rise and fall in, 
561. 
of New South Wales, 454. 
floods of, 520. 
in the Feejees, 340. 
of Oregon, 613, 617. 
flowing from the Rocky Mountains, 
613. 
of Pacific islands, often confined mostly 
to windward side, 27, 159. 
of Upolu, 314. 
effect of, on coral reefs, at Feejees, 341, 
342. 
Rocks of Chili, stratified, 583. 
basaltic and porphyritic, 579. 
granitic, 561. 
of the Feejees, 345. 
of Madeira, 550. 
INDEX. 
Rocks of New South Wales, 456, 469, 
485, 495, 733. 
degradation and decom- 
position of, 526. 
of New Zealand, 438, 733. 
of Oregon and North California, 625, 
630, 632. 
of the Pacific, 372, 782. 
of Samoa, 308, 
of Upolu, 315, 732. 
of Tutuila, 310. 
of Oregon and North California, topo- 
graphical relations of, 635. 
decomposition of, 637. 
of San Lorenzo, 598. 
of Sandwich Islands, 155. 
Oahu, 238, 250, 733. 
Kauai, 266, 272, 733. 
Maui, 230, 231, 733. 
of Society Islands, 294. 
decomposition of, 298. 
of Tierra del Fuego, Nassau Bay, 
602. 
of coral material, 37, 39,57, 147, 149. 
used for building on Oahu, 39. 
ibid. at Maldives, 64. 
of beach, origin and characters of, 43, 
64, 149. 
of drift-sands on shores, 45, 64, 149, 
254, 277. 
Rocky Mountains, general features of, 611. 
height of pass in, 612. 
period of rise of, 668. 
Rose Island, 78, 308. 
Rota, island of, 410. 
Rotuma, island of, 407. 
Royle, Dr., on lakes in India, 522. 
Ruptures, see [’ssures. 
Rurutu, island of, 405. 
Sabine, E., chart of magnetic intensity, 
428. 
Sacramento Bute, 649. - 
Saint Helena, feldspathic rocks of, 373. 
Sal ammoniac in New Zealand, 446. 
at Kilauea, 181, 201. 
Salines of Australia, 455, 469. 
