VI. SCIENCE
(a) Herbert Spencer, The Genesis of Science, in "Illustrations of Universal Progress:" The essential nature of science. (b) T.H. Huxley, The Method of Scientific Investigation, in "Man's Place in Nature:" The relation between scientific and everyday modes of thinking. (c) John Tyndall, On the nature and function of the sun, in Chapter XIV of "Heat as a Mode of Motion:" The general relation between the facts presented by Tyndall and those presented in The Physical Basis of Life (page 240). (d) A.R. Wallace, Darwinism as Applied to Man, in "Darwinism": A comparison of this piece, in respect to aim and method, with Darwin's Mental Powers of Men and Animals (page 263). (e) Charles Darwin, On the flower of the ladies' slipper, in Chapter VIII of "Fertilization of Orchids by Insects." (f) T.H. Huxley, On the Formation of Coal, in "Discourses Biological."