INDEX 



Key to pronunciation : fate, senate, fat, arm, ask ; mete, event, met, her ; 

 ice, It ; 5ld, obey, not ; unite, up ; obscure sounds : a, u. 



Acquired characters, definition of, 

 73, n. ; illustrations of, 73, 74, 75; 

 contrasted with mutations, 80 



Adolescent era, 129-135 



Alcohol, effect of, on chicks, 118, 

 1 19 ; effect of, on guinea pigs, 119; 

 effect of, on descendants, 122- 

 125; relation of, to feeble-minded- 

 ness, 122, 125, 186; as a bever- 

 age, 145-1 52 ; effect of, in surgery, 

 146; effect of, on brain cells, 

 146 



Amaryllis, new variety of, 29 



American Museum of Natural 

 History, horse bones shown in 



34 

 Amoeba (a me'ba), multiplication of, 



101, 103 



Ancestral reminiscence, 68 

 Andalusian fowls, 7-1 1 ; results of 



mating, 9 ; color inheritance of, 



10 

 Angleworms studied by Darwin, 



43' 44 

 Annapolis, entrance examinations 



for, showing weak heart, 141 

 Aosta, the cretins of, 181, 182 

 Arizona, horse bones found in, 38 

 Ashby, Dr., 199 

 Austria, 27 



Babies, growth of, described by Dr. 



Minot, 115; health of, 117; eye 



treatment of, 177 

 Bataillon, Professor, 100 

 Beagle, 45, 46, 48, 51 

 Beetles, effect of damp heat upon, 



97-99 



Bern, families studied in, 122 



Bering's Strait, 48 



Bethnal Green, condition of, in 1848, 



196, 197 



Bezzola, Dr., 122, 123, 125 

 Biffen, Professor R. H., 27 

 Birds, survival of, in winter, 60 ; 



beaks of, in illustration, 85, 86 

 Blincoe, Robert, 190 

 Blindness, case of, in hotel, 174; 



cause of, 174, 175; prevention 



of, 177, 180 



Blood, transfusion of, 145, 146 

 Boll weevil, harm done by, 29 

 Boston reached by potato bugs, 90 

 Brachydactylism (brak i dak'ti lizm), 



definition of, 77 ; studied through 



five generations, 79 

 Brain, effect of alcohol on, 146-148 ; 



inhibition centers of, 147 ; order 



of development of, 147 ; advantage 



and disadvantage of, 160; the 



crown of evolution, 160 

 Brontosaurus, 154 

 Briinn, 20 

 Burbank, Luther, 28, 30, 31 



Cactus, with thorns and without, 



3 1 

 Canada invaded by the potato bug, 



90 

 Canneries, children at work in, 



J93 

 Castle, Professor W. E., 12, 13, 14, 



1 6, 17 



Cats, short-tailed, 75 

 Chappie, Dr., 147 

 Characters defined, 12 



231 



