Longmans, Green and Co., London, 1912.  Hard cover, 200 pages.  Good; blue cloth with gilt lettering on spine, front board blind ruled.  Boards show edge and cover wear, some spots and faded damp stains; corners and spine ends bumped and worn; binding sound; some soil on outer page block; no jacket.  Prior owner’s name on front fly; some offsetting to end papers; light foxing throughout; interior clean and unmarked; 12 diagrams in text.  ‘I have reached the conclusion that every physical phenomenon is due to the operation of energy transformations or energy transmissions embodied in material, and takes place under the action or influence of incepting energy fields.  In any instance the precise nature of the phenomena is dependent on the peculiar form of energy actively engaged, on the nature of the material to which this energy is applied, and on the nature of the incepting field which influences the process.’  (from Preface)