INDEX. 
■ 4 - 
A BBEYS of St. Germain and St. Denis, 
revenues of, 6. 
Adirondack forest, 235 ; lakes of, 35'7. 
Ailanthus glandulosa, 515. 
Akaba, gulf of, infiltration of fresh water 
in, 440. 
Albano, lake of, artificial lowering of, 353. 
Algeria, deserts of, artesian wells in, 443 ; 
sand dunes of, 463 ; consolidated dunes, 
480. 
Alpaca, South American, 83. 
Amazon, Indians of, 11. 
Ameland, island of, 499. 
America, North, primitive physical con¬ 
dition of, 27, 43 ; forests of, 28 ; pos¬ 
sibility of noting its physical changes, 
52 ; by scientific observation, 53 ; for¬ 
est trees of, 274; sand dunes of, 469 ; 
proposed changes in hydrography of, 
532. 
Animal life, sympathy of ruder races 
with, 39 ; instinct, fallibility of, 40; 
hostility of civilized man to inferior 
forms of, 121. 
Animals, wild, action of on vegetation, 78. 
Aphis, the European, 104. 
Apennines, effects of felling the woods 
on, 150, 152. 
Appian way, the, 542. 
Aqueducts, geographical and climatic ef¬ 
fects of, 358. 
Arabia Petraea, surface drainage of, 440 ; 
sandstone of, 452; sands and petrified 
wood of, 455 ; wadies of, 538. 
Aragua, valley of, Venezuela, 202. 
Ararat, Mt., phenomenon of vegetation 
on, 287. 
Ardeche, 1’, department of, 152 ; de¬ 
struction of forests in, 389. 
—river and basin, floods of, 386; supply of 
water to the Rhone, 388, 398 ; violence 
of inuudations of, 388 ; damage done 
by, 390; effect on river beds, 391; 
force of its affluents, 392. 
Argostoli, Cephalonia, millstreams of, 
434. 
Armenia, ancient irrigation of, 366. 
Arno, the river, deposits of, 414; upper 
course of in the Val di Chiana, 417, 
420. 
Artesian wells, their sources, 441 ; usual 
objects, 442; occasional effects, 442 ; 
employment in the Algerian desert, 
443 ; by the French Government, 444 ; 
success and probable results of, 445 ; 
knownU;o the ancients, 443 ; depth of, 
444. 
Arundo arenaria, 501. 
Ascension, island of, 205. 
Auk, the wingless, extirpation of, 95. 
Australia a field of physical observation, 
61. 
Avalanches, Alpine, various causes of, 
266 ; by felling trees, 270. 
Azoff, sea of, proposed changes, 531. 
B ABINET, plan for artificial springs, 
by, 448. 
Baikal Lake, the fish of, 117. 
Baltic Sea, sand dunes of, 467. 
Barcelonette, valley of, former fertility, 
243 ; present degradation of, 244. 
Bavaria, scarcity of fuel in, 299. 
Bear, the mythical character of, 40. 
Beaver, the, agency in forming bogs, 31; 
cause of its increased numbers, 84. 
Bee, the honey, products of, 105; intro¬ 
duction in United States, 106. 
Belgium, effect of plantations in, 152; 
Cam pine of, 513. 
