fy the
materialistic demands of our day, and to show that there does actually
exist between the men of all ages and all lands an effective
interconnection, which is uniform, persistent, nay eternal" [pp.
392-393, English edition].

[64] According to this theory, which was initiated by Gustav Jaeger in
1878, there occurs an eternal transmission of an inheritable germ plasm,
this being temporarily housed within the perishable soma of the
individual living being. The hypothesis of the undying plasma has given
rise to lively discussions which are still in progress.

[65] Ueber Ursprung und Bedeutung der Amphimixis, "Biolog.
Zentralblatt," xxvi, No. 22, 1906.

[66] This seems to me the weak point in the theory. How can we reconcile
the mutation and the variability of the germ plasm, with its immortality
and its eternal transmission?

[67] Species and Varieties: their Origin by Mutation, Kegan Paul,
London, 1905.

[68] Closing sections of Chapter Thirteen.

[69] I should like to give an account here of Nicolai's solution of the
problem of liberty. He discusses the matter in one of the most important
sections of his book.--How can a biologist, filled with a feeling of
universal necessity, find place, amid that necessity and without
prejudice to it, for human freedom? One of the most notable
characteristics of this great mind, is Nicolai's power of associating
within himself two rival and complementary forces. He makes a suggestive
study, at once philosophic and physiological, of the anatomy of the
brain and of the almost infinite possibilities the brain holds for the
future (all unknown to us to-day), of the thousands of roads which are
marked out in the brain many centuries before humanity dreams of using
them.--But to follow up this study would lead us beyond the scope of the
present article. I must refer the reader to pp. 58-68 of _The Biology of
War_ [English edition]. These pages are a model of scientific intuition.

[70] Chapter Ten, p. 309 [English edition].

[71] Chapter Fourteen.

[72] Chapter Ten, pp. 270-271 [English edition].

[73] Introduction, p. 11 [English edition].

[74] "Um dem guten und gerechten Menschen meine triumphierende
Sicherheit zu geben." Introduction [p. 10, English edition].

[75] The most important of these studies have been collected in the
great work _Les Fourmis de la Suisse_ (Nouveaux memoires de la Societe
helvetique des Sciences naturelles, vol. xxvi, Zurich, 1874), and in th