The problem of human life : containing the fundamental principles of the substantial philosophy, with a review of the six great modern scientists, Darwin, Tyndall, Huxley, Haeckel, Helmholtz, and Mayer, upon evolution, spontaneous generation, the nature of force, &c., &c / by Wilford Hall.

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The problem of human life : containing the fundamental principles of the substantial philosophy, with a review of the six great modern scientists, Darwin, Tyndall, Huxley, Haeckel, Helmholtz, and Mayer, upon evolution, spontaneous generation, the nature of force, &c., &c / by Wilford Hall. Public Domain Mark. Source: Wellcome Collection.