APPENDIX
THE SCRIBE'S NOTE ON APPENDIX
As explained by the author in [Chapter I.], this appendix has been added for the sake of those readers who may wish further details than have been given in the electron's story.
It is only necessary to give a brief notice of the more important particulars, as the author has written recently upon this subject in a popular form.[1]
[ [1] "Scientific Ideas of To-day." By Chas. R. Gibson, F.R.S.E. (London: Seeley & Co., Ltd. Five shillings net.)
It was known two thousand years ago that when a piece of amber was rubbed with a woollen cloth, the amber would attract light objects towards it. Amber was considered to be unique in this respect.
About the year 1600, one of Queen Elizabeth's physicians, Dr. William Gilbert, inquired into this attractive property of amber. He found that many other substances possessed the same property. Indeed it is common to all substances in some degree. We say the amber or other object is "electrified."