This book, "Human efficiency and levels of intelligence lectures delivered at Princeton University April 7,8,10,11, 1919. 1", by Henry Herbert Goddard, is a replication of a book originally published before 1920. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.