Italian character; and instead of on kites, 345; on sails, 346. Windmills, 375. Window, oval, in ear, 272. Wireless telegraphy, 137; advance of, 145; receiver, 140, 141; syntonic, 143; transmitter, 138, _139_. Yale lock, _436_, _437_. Yellow spot, in eye, 251. Zech, Jacob, 414. Zeiss field-glasses, 260. THE END. LONDON: PRINTED BY SPOTTISWOODE AND Co, NEW-STREET SQUARE AND PARLIAMENT STREET SIXTH EDITION. VOL. II. LONDON: LONGMANS, GREEN, AND CO. 1879. All rights reserved. PREFACE TO THE COLOUR AND CHEMICAL CONSTITUTION OF NATURE. II. RADIATION. 1. Visible and Invisible Rays of the Christian peasant resorted to in proof that nothing short of.