Earth, the, quiverings of the surface, 169-71; the Northern and Southern Hemispheres, 171, 172.
Edison, Thomas A., 114, 119; contrasted with Mr. Ford, 122-25.
Emerson, Ralph Waldo, quoted, 69, 165, 186.
Ford, Henry, 113, 114, 119, 120; contrasted with Mr. Edison, 122-24.
Germans, Darwinism, and the World War, 172-75.
Goldfinch, flight, 37, 42; chorus singing, 40-42; notes, 42; notes of young, 43; nesting, 43.
Hummingbird, ruby-throated, 64; bathing in dew, 13; nest, 79; a fairy bird, 94.
Insects, their world, 23-25, 162; senses, 24; reaction to heat, cold, and vibrations, 25; antennæ, 25; the ruling sex among, 140, 141.
Junco, young, 19, 20; nesting, 81; abundance, 82.
Maeterlinck, Maurice, quoted, 23, 162; on the bee, 156-63.
Man, and Darwinism, 174; a part of nature, 184-86; interpretation of nature and of himself, 186-90; mystery of his evolution, 216.
Maple, sugar, susceptibility to atmospheric changes, 72, 73.
Nature, her methods unlike ours, 179-81, 199; interpreting, 186-90; lavishness and parsimony, 195, 196, 209; puzzling and contradictory, 201, 202; all-seeing, 212-14; her movements circular, 214-16.
Oriole, Baltimore, 30, 56; nest, 48-52, 64.
Osborn, Henry Fairfield, on the origin of life, 194, 195.
Pennsylvania, motor trip through, 109-13.
Pewee, wood, nest, 52, 64; its plaint, 87.
Phœbe, flight, 37; nest, 52-54, 56, 59, 60, 64, 79, 80.
Rabbit, its protection, 166; caught by a weasel, 177, 178.
Robin, young, 19; nest, 53-55, 64, 176; fear of man, 57, 58; fittest to survive, 175, 176; versatility, 176; a hustler, 176; danger of a plague of robins, 177; a runner, 177.
Roosevelt, Theodore, visit to Pine Knot, Va., with, 101-08; knowledge of India, 101; opinion of Taft, 105; killing a mosquito, 105, 106; protection of the President, 106; bird-gazing, 107; letter from, 107, 108.
Shaler, Nathaniel S., quoted, 169; on the Northern and Southern Hemispheres, 171, 172.
Sparrow, chipping _or_ social, nest, 53, 54.
Sparrow, song, song flight, 37; nesting, 54; singing, 85, 86.
Sparrow, vesper, nesting, 80-84; its names, 82; appearance and habits, 82, 83; courted by a skylark, 83.
Species, origin of, an insoluble problem, 167-69, 199.
Swallow, barn, 71; parental anxiety, 76, 77; notes, 76, 77; pleasing qualities, 77, 78.