ACKNOWLEDGMENT
“The Life and Works of Darwin” was an address delivered at Columbia University on February 12, 1909, the hundredth anniversary of Darwin’s birth, as the first of a series of nine lectures on Charles Darwin and his influence on science. “The Darwin Centenary” is based on an address in reply to the reception of delegates at Cambridge. “A Student’s Reminiscences of Huxley” was a lecture delivered at the Marine Biological Laboratory of Wood’s Hole in the summer session of 1895. The address on James Bryce was delivered at the memorial service to Viscount Bryce at the Cathedral of St. John the Divine, March 5, 1922. The address on Joseph Leidy was originally delivered at the Joseph Leidy Centenary, Philadelphia, December 6, 1923, and was later published in Science. The article on Howard Crosby Butler was an address delivered at the Graduate College of Princeton University, October 31, 1922. This address was afterward published in the Butler memorial volume by the Princeton University Press. The chapter on John Burroughs is an address which was delivered at the John Burroughs memorial meeting, American Academy of Arts and Letters, on November 18, 1921.
Other chapters of this book are based on articles published in the following magazines: Popular Science Monthly, Science, The Century, The Sierra Club Bulletin.
ALFRED RUSSEL WALLACE