This book is a replica of the original from the collections of The New York Public Library; it was produced from digital images created by The New York Public Library and its partners as part of their preservation efforts. To enhance your reading pleasure, the aging and scanning artifacts have been removed using patented page cleaning technology. We hope you enjoy the result.
George Frederick Barker was an American physician and scientist. He graduated from the Yale Scientific School in 1858. He was successively chemical assistant in Harvard Medical School in 1858–1859 and 1860–1861, professor of chemistry and geology in Wheaton College.