All actual. A pendulum at the time when Mr. Hirst experimenting at Zermatt on the subject assumed a blank card, on which Mr. Mozley adduces various illustrations of "How It Works"-- Messrs. F.J.C. Pole and M.G. Tweedie (for revision of MS.); W. Lineham; J.F. Kendall; E. Edser; A.D. Helps; J. Limb; The Edison Bell phonograph.] [Illustration: FIG. 12.--Section of a core.