I, V, X, etc. = Introduction: P = Plant Biology: A = Animal Biology: H = Human Biology.
Aboral surface, A 35.
Aborted seeds, P 166.
Absorption, H 106.
Abutilon, P 156.
Accessory fruit, P 164, 169.
Accommodation in eye, H 143, 153.
Acephala, A 107.
Acid, ix.
Adaptation to environment, P 6, A 148, 185, 201, 205, 207, H 19, 108, 109, 110.
Adenoid growths, H 86.
Adipose tissue, H 12.
Adulteration of food, H 93.
Adventitious roots, P 36;
buds, P 114.
Aerial roots, P 34.
Aggregate fruit, P 168.
Air cells, H 75.
Air plants, P 35.
Akenes, P 165.
Albinism, H 16, 18.
Albumen, H 92.
Albumin, H 92.
Alcohol and circulation, H 67;
and fermentation, H 158;
and food, H 113;
and muscles, H 50;
and nerves, H 135;
and skin, H 20.
Algar, P 179, 183, 195.
Alkaline, ix.
Alternation of generation, P 179, A 30, 31.
Ambulacral, A 36.
Ameba, A 10.
Americans, H 1.
Anadon, A 98.
Anatomy, H 9.
Anemophilous, P 149.
Animal food, H 95, 110.
Annual plant, P 17.
Antelope, A 215.
Antennæ, A 68, 87.
Anther, P 135, 144, 180.
Antheridium, P 178, 186, 198, 200, 202, 203.
Ant-eater, giant, A 199;
spiny, A 196.
Ant-lion, A 91.
Ape, A 220.
Apical dehiscence, P 166.
Appendicitis, H 106.
Appendix, vermiform, H 106.
Appetite, H 94, 110.
Aptera, A 82.
Apteryx, A 174.
Aquarium, A 17.
Archegonium, P 178, 198, 200, 202, 203.
Argonaut, paper, A 107.
Arm, H 33.
Armadillo, A 200.
Arrowhead, H 2.
Arteries, H 51, 53, 54, 61.
Arthropoda, A 9, 125.
Arum family, P 140.
Ash, P 92.
Asiatic cholera, H 160.
Assimilation, P 97, H 90.
Association fibers, H 123, 126.
Asthma, H 86.
Astigmatism, H 144.
Athletics, H 46, 47.
Atwater's experiments, H 113.
Auricle, H 53.
Automatic action, H 123.
Axil, P 112.
Axis, plant, P 15.
Axon, H 119.
Bacillus, H 158, 159.
Bacteria, P 39, 109, 182, H 158, 159, 160, 161.
Bandage, H 62.
Barberry, P 157, 193.
Bark, P 54, 66, 67.
Bark-bound trees, P 54.
Bast, P 61, 66.
Bat, A 202.
Baths, H 23, 24.
Batrachia, A 126.
Bean, P 20, 28, 39, 194, H 95, 96, 112.
Beaver, A 204.
