ANALYSIS OF CONTENTS. xi 
PAGE 
protoplasm relatively but not absolutely stable. Do ex- 
trinsic factors affect germinal protoplasm? Diminished 
nutrition. Changes in environment. Use and disuse. 
Mechanical conditions. Results of impact. Value of 
direct experiment. Return to the position of Darwin. 
The final word still far distant. \ 
V.—THE HEREDITY OF RICHARD ROE . 3 3 . 118 
Formation of character. Hereditary tendencies. In- 
heritance of humanity. Inheritance of race characters. 
Individual characters. The germ cell. Protoplasm. 
Chromatin. Inequality of Nature’s divisions. Atavism. 
The mid-parent. The thoroughbred. Changes through 
experience. Inheritance of acquired characters. Nature 
of acquired characters. Prenatal influences. Transmis- 
sion of impaired vitality. Ibsen’s ghosts. Potentialities 
not character. The higher heredity. The unity of the 
ego. The ego a co-operation, Fame not greatness. 
Counting one’s ancestors. Lineage of a little girl. All 
Englishmen of noble birth. Effect of primogeniture. 
Origin of the English character. Race types and the 
survival of the existing. 
VI.—THE PHYSICAL BaSIS OF HEREDITY. By Professor 
Frank Mace McFarland . : : : : . 147 
The cell theory. The meaning oftheterm ‘‘cell.” Uni- 
cellular and multicellular organisms. The essential 
parts of the cell. The protoplasm. The nucleus. Ka- 
ryokinesis. The chromosomes. Division of the centro- 
some. The spindle. Division of the chromosomes. 
Phases of cell division by karyokinesis. Direct division. 
Somatic and reproductive tissues. Differentiation of so- 
matic and reproductive tissues in Ascaris. Reproduction 
in Protozoa. Conjugation. Gradual differentiation of 
reproduictive cells. Reproduction in Eudorina. Repro- 
duction in Metazoa. Fundamental identity of the germ 
cells. The egg cell. Maturation. The sperm cell. 
Fertilization. Cleavage. The reduction of the chromo- 
somes. Theories as to structure and significance of the 
