Note 4 — THE OUTLINE OF HISTORY

Here in this history of life we are doing our best to give only known and established facts in the broadest way, and to reduce to a minimum the speculative element that must necessarily enter into our account. The reader who is curious upon this question of life’s beginning will find a very good summary of current suggestions done by Professor L. L. Woodruff in President Lull’s excellent compilation The Evolution of the Earth (Yale University Press). Professor H. F. Osborn’s Origin and Evolution of Life is also a very vigorous and suggestive book upon this subject, but it demands a fair knowledge of physics and chemistry. Two very stimulating essays for the student are A. H. Church’s Botanical Memoirs. No 183, Ox. Univ. Press.