editions:wYXZBk7a4uQC. 含有內容需登入查看的頁面 (link) Egremont, Max. Balfour – A Life of Arthur James Balfour. London: Phoenix. 1998. ISBN 978-0-7538-0146-8. Ekwall
Anne. Sir Humphrey Davy. Dawnings of Genius. London: Charles Knight and Company. 1841. (Davy's first name is spelled incorrectly in this book.) Humphry
Effects of a Magnetic Field on Radiation (1900), New York: American Book Company, page 64 John Kerr LL.D. A new relation between electricity and light: