274,278.Hearing, hardness of,118.Heart disease,154.Hegner,27,38.Heliotropism,198.Helm,109,111.Hemophilia,64.Hereditary character defined,12.Hereditary mingling, mosaic rather than blend,13.Hereditary transmission, laws of,68.Heredity: and environment,295;dual ancestry in,6;defined,1;false,163;human, uncertainty of records,98;in protozoa,22,23;in insanity, importance of,261;in sexually reproducing forms,7;in unicellular forms,22,23;methods of study,14,15;new discoveries in,67;not a blend,13;race betterment through,289.Heritage, blood,1.Heron,307.Heterozygote:80;detection of,80.Hill-folk, the,271.Hodge,175.Holmes,203.Home, for children,338.Homozygote,80.Huntington’s chorea,113-115,243,325.Huxley,195,205.Hybrids:52;whites and negroes,297,298.Hypotrichosis,113.Hysteria,117.Ichthyosis,65.Ideals, importance of establishing in children,223.Idiots,244.Imbeciles,244.Immigrants, duty of excluding undesirable,335.Immigration: and mental unsoundness,281,282;bearing on crime and delinquency,280;bearing on venereal diseases,282;importance of restricting,283,335.Immortality: of protozoa,23;of the race,3.Immunity, artificial, not inherited,155.Inbreeding, in defectives,271.Individual, and race,3.Inebriate women, offspring of,168.Inebriety, constitutional,180.Infant mortality,149.Infection, prenatal,147.Inheritance: and disease,146;blended,87,93;of tendencies,107.Inhibitions,216.Inhibitors,79.Insane, increase in numbers of,233,234.Insanity:117;certain forms recessive,243;eugenical significance of,234,235,240;importance of early diagnosis,259;some forms not hereditary,260;types of,239;prevalence in the United States,228,229.Insect colors, effect of temperature,129.Instincts:203;adjustable,203;not inherited acquirements,144;origin of intelligent behavior from,203,204.Institutional figures misleading,266.Intelligence,205,206.Intelligent behavior, opening up possibilities of,204.Ireland,171.Irritability, characteristics of living protoplasm,197.Jennings,203,204.Johnson,305.Johnstone,245,319,320,321.Jolly,243.Jordan,4,299.Jukes,270.Kallikak family,269,270.Kellicott,314,316.Kellogg,299.Keratosis,113.Kidney diseases,154.Kirby,187,324.Knox,256.Kraeplin,242.Laitinen,174.Language, as mental aid,206,207.Lapsed intelligence, theory of,145.Larval stages, susceptibility of,128.Laws, sterilization,323,327,329.Lead-poisoning:163;experiments on rabbits,163.Lederbaur,131.Legal restraint of defectives limited,331.Lens: displaced,113;cataract,112.Leprosy,152.Leptinotarsa, production of variations in,125.Linden, Countess von,129.Linin,31.Little’s disease,215.Locomotor ataxia,187.Loeb,62,203.Longevity,120.Lord Morton’s mare,10.Lorenz,113,114,115.Low birth-rate,308.Lowell, Judge John,312.Luetin test,188.Lunborg,243.MacDougal,125.Margaret, Mother of Criminals,270.Marriage: barriers to,331;inter-racial,296;medical inspection before,191.Mast,203.Maternal impressions,159-160.Maturation:39,41,43,44;parallel between egg and sperm-cell,44,46.Mechanical skill,120.Mechanism of heredity,22,25,26,28,29,30,35,37,40-54,94,95.Melancholia and crime,279.Memory:120,204;not a complete test of normality,268,269.Mendel:68;work on peas,82.Mendelian factors and chromosomes:93;inheritance and man,97;principles, rediscovery of,68;ratio, cause of,71.Mendelism,67,69.Mental and nervous defects,228.Mental defective: defined,255;disproportionate increase in,232;numbers married,231,232;inefficiency of marriage laws concerning,315.Mental deficiency: not always inherited,248;tests for,254,255.Mental organization of lower vertebrates,205.Mental process as neural process,195.Mental unsoundness,196.Mentality, inheritance of,19.Mentally disordered, cost of caring for,257,258.Mercier,279.Merriere’s disease,117.Metazoa,28.Metz,41.Mice,78.Michigan, state report on mentally defective,234.Migraine,101.Mind, relation to brain,195.Mitosis:32,33;meaning of,34,37.Mjöen,171.Modifiability of behavior,200,204,205,207,217,219,224,225,337.Mongolians,248.Moral responsibility,227.Morgan, C. Lloyd,146,211.Morgan, T. H.,59,66.Moron,244,268.Morons and crime,268.Mosaic, heredity a,13.Motherhood, safeguarding,165.Motive, training in,220.Mott,150.Mulattoes,92.Multiple sclerosis,64,117.Muscular atrophy:113;Gower’s,65.Musical ability,120.Mutations: artificial production of,125;germinal,125.Mutilations, non-inheritance of,134.Myopia,64.Naegeli,131.Nam family,271.Natural selection partly done away with in human society,292.Near-sightedness,64.Nervous and mental diseases,153.Nervous organization, inheritable,242.Nervous response, in lower organisms,196.Nervous system: mainly inherited,210,216;establishment of pathways in,210;maladjustments of,231;special developments in man,213,214,215;units of,208.Nervous systems of anthropoids,214.Neural pathways, not all established at birth,217.Neuritis optica,65.Neurons,208.Neuron theory,208.Neuropathic constitution, expression of,241.Neuropathic defects, carriers of,253.Neuter insects, heredity in,136,137.New characters, origin of,138.Newman,56.Nicloux,172.Night-blindness,65.Nilsson-Ehle,88,89.Noguchi,186.Nucleolus,31.Nucleus, structure of,31.Nulliplex character,80,100.Obesity,120,154.Offspring: from one parent only,5;different from either parent,12.Oöcyte, primary, secondary,44.Oögenesis,44.Oögonia,44.Optic nerve, atrophy of,64.Organs, formation of,36.Origin of sex cells,12,36.Ovaries, transplantation of,134.Ovum,26,40.Paralysis, general,186.Paranoia,279.Parent-body and germ distinct,12.Parenthood, cultivation of wholesome sentiment toward,336.Paresis:186;and crime,279.Parthenogenesis,6.Patterson,56.Paul,163.Pearson,150,151,179,296,307.Peas,68,82.Performance tests,256.Peron,133.Personality determined by heredity,2,195.Peterson,242.Phenotype,86.Phillips,134,135.Phototropism,198.Pinard,165.Pineys, the,271.Plato,290.Poellman,271.Polar bodies,44,45.Polydactyly,108.Potato-beetle, production of variations in,125.Potts,292.Predisposition to disease,148.Pregnancy, neglect of mothers during,165.Prenatal care:336;infection,147;influence,11,159,162.Prenuptial medical inspection desirable,336.Presence and absence theory:78;formulæ for man,99.Primrose, experiments on,125.Principles, Mendelian,68.Prisoners, many mentally subnormal,266.Pronucleus,47.Protective coloration, not of somatic origin,135,136.Protoplasm, germinal,39.Psychical development,196,203,205,206,213,215.Pyramidal tracts,214.Quagga hybrid,10.Race amalgamation:297,298;deterioration, in a selected population,303.Racial degeneracy, not curable by improved environment alone,294.Ratio: the 1:2:1,73;the 3:1,77;the 9:3:3:1,85;the 27:9:9:9:3:3:3:1,87;the 15:1,88;the 63:1,90.Rational behavior,205,206.Reason,206.Recessiveness:74;in man,115.Records of family traits desirable,337.Reduction division,41,42.Reflexes,203.Regression, law of,17.Renault,172.Rentoul,232.Reproduction: asexual,6,26;sexual,26;sexual and variation,139.Reproductive cells,27,28,29.Responsibility for conduct,195.Rest, importance of, in pregnancy,165.Reversion:7,8;and atavism,8;in guinea-chicken hybrids,8.Rheotropism,198.Rheumatism,154.Ritter,143.Rogers,246,272.Romanes,133.Rosanoff,243.Rossolimo,256.Rudin,243.Salpingectomy,322.Sanford,205.St. Vitus’ dance,117.Schulze,24.Schuster,296.Sclerosis, multiple,64,117.Segregation: in dihybrids,84;Mendelian,69,70,75;of defectives,318.Seguin,256.Self-control, importance of,221,267,268,284,286,287.Sex: and chromosomes,59;and heredity,53;cells of Volvox,25;chromosome,57,58;determination,55;differentiation and X-element,60;evolution of,25-30;hygiene, question of school instruction in,285;in certain insects,56;linked characters,60,65;not a necessary factor in heredity,6;problem, knowledge alone not sufficient,286.Sexual vice,284.Sharp,322.Simplex character,80,99.Skill, non-transference in brain,212,213.Skin, color of,92.