Gregarious instinct in boys--Craving for association with their own kind--Two kinds of boy gangs--The supervised gang--The unsupervised gang--Illustrations of each--The gang leader and his qualifications--The necessity for a meeting place--Morals of unsupervised gang always lower than morals of its individual constituents--Motives for gang activities--Their code of honor--Street gangs are training schools for delinquents--Gang spirit inherent in all boy-nature--Supervised gangs and their influence on character development--Necessity for urging boy to join good gang. XIII. THE BOY SCOUT INFLUENCE 183 The magic of the name Scout--The Boy Scouts of America--What the movement is--Ranks and requirements--Good turns and illustrations--Appeal of uniform and hikes to boy before joining--Purpose of organization is character-building--A former method of teaching ethics--Scout camps and hikes--The camp-fire tale as a means of training--The qualities which Scout associations develop--Boy Scout organization founded on sound psychology--A denatured gang--Opinions of sociologists-- The universality of its appeal to boyhood--An efficient method of training boys in mass--It keeps the boy busy--The busy boy is the best boy--A field of social service for the adult. XIV. JUVENILE READING 206 Potent influence of books on the boy--Next to environment and companions--Two-fold value of literature--Desire of boy for something to read--He reads for entertainment; studies because compelled to--Reading must be suited to mental and psychological requirements--Fairy tales--Adventure tales--Informative books-- Dime novel and nickel library--Their effect on morals and literary taste--The bad book in the outward dress of good fiction--The psychological requirement for thrilling adventure tales--Comic Sunday supplements--Ideal companions for boys found in best books--Doses of literature as remedies for diseases of character--Stories of animal life--The juvenile magazine--A list of books useful for outlining a course of juvenile reading. XV. AGENCIES FOR SEX-INSTRUCTION 227 Importance of accurate sex knowledge--Misinformation acquired at a very early age--Necessity for scientific instruction--Former antipathy to discussion--Parent is natural teacher of sex-- Neglect of parental duty--Necessity for other agencies of instruction--Grammar schools, high schools, colleges, etc.-- Danger of premature sex excitation--Individuals who are best adapted to teach--Teacher, physician, biologist, special lecturer--Opinions for and against the school as agency for sex-instruction. XVI. ON OUTLINE OF SEX-INSTRUCTION 238