Printed by BALLANTYNE, HANSON & CO. Edinburgh & London TRANSCRIBER'S NOTE: In this plain-text version, numerical subscripts have been transcribed within {} brackets, such as: M{1}. Obvious typographical errors from the original printed version of this book have been corrected without comment. Footnotes in the plain-text version have been placed at the end of the paragraph in which the footnote tag appears. Illustrations have been moved to the nearest paragraph break. End of Project Gutenberg's The Energy System of Matter, by James Weir