M

• Mammoth Cave, eyeless spider of, 11;
  • eyeless fish of, 11;
  • homing sense in the beetles of, 196.
• Mandril, a revengeful, 95.
• Medusa, intoxicated, 15.
• Melanoplus, reënforcing auditory ganglia of, 32.
• Memory, its discussion under four heads, 60.
• Mimosa pudica, death-feigning by, 208.
• Mimosa strigilosa, death-feigning by, 208.
• Mind, definition of, 1.
• Mole, degeneration of sight organs in, 10.
• Moneron, non-differentiation of nerve-cells in, 3;
  • nervoid elements in, 3.
• Monkey, author chosen as a friend by, 82;
  • a laughing, 89;
  • sorrow and reproach manifested by, 97;
  • faculty of computing in the, 177;
  • use of hammer by a, 222.
• Morphology, its correlation with physiology, 2.
• Mouse, love of music in, 116;
  • musical discrimination in, 117;
  • Quigley's observations, 117;
  • Benedick's experiments with, 117;
  • author's observations and analysis of the song of "singing," 118;
  • Ada Sterling's observations of music-loving, 118, 119.
• Mule, idea of time evinced by a, 175, 176.
• Myrianida, eyes of, 17;
  • reproduction in, 18.
• Myrmeca ruginodis, memory of friends (kindred) in, 68;
  • experiments with, 68.
• Myrmecocystus, the honey-making, 157;
  • natural history of, 158;
  • author's experiments in testing the reasoning powers of, 158, 159;
  • division of labor in a colony of, 161.

N

• Nectocalyx, marginal bodies in jelly-fish's, 51.
• Nerve, transmission of impressions through, 41;
  • the power of discrimination in, 41;
  • the association of ideas (impressions) in, 43;
  • memory in, 43.
• Newt, tinctumutation in, 186;
  • author's experiments with, 186.

O

• Œquorea, eyes of, 15.
• Œstrus equi, selection of foreleg of horse for oviposition by, 103.
• Onchidium, cephalic eyes of, 26;
  • dorsal eyes of, 26.
• Opossum, letisimulation in the, 202, 212.
• Orang-utan, laughter in the, 89;
  • use of missiles by, 222.
• Ox, homing sense in the, 199, 200.
• Oyster, eyes of, 16.

P

• Papilioninæ, length of life in tropical, 137.
• Perch, love of offspring in the white, 138.
• Periophthalmus, habitat of, 25;
  • peculiar mode of life of, 25;
  • eyes of, 25;
  • food of, 26.
• Pigeon, love of music in the, 122;
  • Lockman's account of a music-loving, 122;
  • musical discrimination in, 122.
• Pipe-fish, parental affection in the, 139;
  • Risso's observations, 139.
• Plaice, the origin of unilateral eyes in the, 9;
  • absence of color-changing faculty in blind, 188;
  • Pouchet's demonstration of the color-changing function of the sympathetic nerves in, 189.
• Podura, F. fusca and F. rufescens make pets of, 126;
  • author's observations of, 126.
• Polyergus, lowering tendency of slavery shown by, 155, 156.
• Prionus, author's experiments in locating organs of hearing in, 36.

Q

• Quail, domesticated, 111;
  • love of caresses in, 111;
  • love of instrumental music in, 111;
  • fondness for the singing voice in, 112.

R

• Rat, fondness for instrumental music in, 116;
  • power of musical discrimination in, 116.
• Reason, definition of, 147;
  • difference between instinct and, 148.
• Rhizopod, sense of direction in, 48;
  • Carter's observations of, 49;
  • memory in, 60.
• Robin, homing sense in, 199.

S

• Sand-wasp, memory of locality in, 62;
  • author's experiments with, 63.
• Sarcoptes Hominis, death-feigning in, 209.
• Satin bird, æstheticism in the male, 128;
  • author's observations of, 128.
• Sea-urchin, eyes of, 16.
• Snail, eyes of, 19;
  • visual powers of, 19;
  • courtship of, 20;
  • location of sense of direction in, 194;
  • author's experiments with, 194;
  • author's experiments in demonstrating homing sense in the, 194.
• Snake, love of young in, 140;
  • author's experiment in testing parental affection of, 140;
  • sense of direction and "homing instinct" in, 198;
  • author's observations of "homing instinct" in, 198.
• Sole, the origin of unilateral eyes in the, 9.
• Song-sparrow, memory of individuals in, 77;
  • parental affection in, 143.
• Spaniel, a laughing, 89.
• Spider, memory in, 72;
  • recognition of individuals by, 73;
  • love of music in the, 108;
  • author's experiments with piano on, 108;
  • author's experiments with pipe organ on, 109;
  • Reclain's observations on the love of music in, 109;
  • decorative instinct present in, 110;
  • peculiar web spun by, 110;
  • parental affection in, 135;
  • author's experiment in testing parental love of, 135;
  • use of implement (pebble anchor) by, 222.
• Squirrel, memory in the, 70.
• Stentor polymorphus, nervous system of, 46;
  • observations of and experiments with, 47;
  • conscious determination in, 47;
  • ganglia of, 47.
• Strongalognathus, degeneration caused by the habit of slave-making in, 155, 156, 157.

T

• Tabanus atratus, balancers of, 33;
  • loss of equilibrium in, 33;
  • anatomy of balancers of, 34;
  • auditory hairs of, 34.
• Termes, kinds of individuals in a colony of, 161;
  • number of eggs laid by queen of, 162;
  • size of gravid queen, 162;
  • New Mexican, 163;
  • soldiers and workers of, 163;
  • instincts and reasoning powers of, 164.
• Terrier, love of music in, 113;
  • musical discrimination in, 113;
  • abstract ideation in, 216.
• Tinctumutation, definition of, 182;
  • location of color-changing sense centre in, 183.
• Toad, memory in the, 87;
  • a performing, 87;
  • parental affection in the Surinam, 140.
• Triticum repens, sick dogs medicate themselves with, 220.
• Turkey, memory of individuals in the, 76;
  • recognition of property rights by the, 221.

V

• Vanessa, tinctumutation in the larva of, 192.
• Viper, death-feigning in the, 207.
• Volition, definition of conscious, 39;
  • physiological aspect of, 40.

W

• Wasp, memory in the, 62;
  • author's experiments in testing memory in the, 63, 69;
  • memory of kindred in the, 65, 69;
  • memory of locality and of events in the, 85;
  • knowledge derived from a single experience by a, 85;
  • length of life in the mud-dauber, 138;
  • evidence of reason in the mud-dauber, 149, 150;
  • psychic actualities of easy acquirement in the ant, the bee, and the, 151;
  • faculty of computing in the mason, 169;
  • author's experiments in testing the computing faculty in the, 170;
  • method of preparing food for the male and female grubs used by the mason, 170.
• Water-louse, sense of direction in the, 194.
• Wren, distress and grief evinced by, 93;
  • recognition of individuals by, 93;
  • gratitude shown by, 94.

ECONOMICS.

BY

EDWARD THOMAS DEVINE, Ph.D.,

General Secretary of The Charity Organization Society of the City of
New York; Sometime Fellow in the University of Pennsylvania;
and Staff Lecturer of the American Society
for the Extension of University Teaching.

16mo. Cloth. $1.00.

"Long experience in the popular exposition of the principles of political economy has given Dr. Edward Thomas Devine peculiar qualifications for the preparation of a text-book upon this subject, and his recently published 'Economics' is an excellent book of its kind. It may be warmly recommended."—Dial.

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THE MACMILLAN COMPANY,

66 FIFTH AVENUE, NEW YORK.

A HISTORY OF PHILOSOPHY

WITH ESPECIAL REFERENCE TO

THE FORMATION AND DEVELOPMENT OF
ITS PROBLEMS AND CONCEPTIONS.

By DR. W. WINDELBAND,
Professor of Philosophy in the University of Strassburg.

Authorized Translation by JAMES H. TUFTS, Ph.D.,
Associate Professor of Philosophy in the University of Chicago.

8vo. Cloth. $4.00, net.

"The work commends itself to every student of philosophy."—Boston Transcript.

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