Preface; 1. Introductory; 2. How each individual acquires his language; 3. The conservative and alternative forces in language; 4. Growth of language; 5. Growth of language (cont.); 6. Growth of language (cont.); 7. Growth of language (cont.); 8. Summary: the name-making process; 9. Local and class variation of language; 10. Indo-European language; 11. Linguistic structure; 12. Other families of language; 13. Language and ethnology; 14. Nature and origin of language; 15. The science of language; Index.