401. Detector in Chubb lock, 436; Yale lock, _436_, _437_. Yellow spot, in eye, 251; yellow, in eye, 251. Zech, Jacob, 414. Zeiss field-glasses, 260. THE END. LONDON: PRINTED BY SPOTTISWOODE AND CO, NEW-STREET SQUARE PARLIAMENT STREET SIXTH EDITION. VOL. I. INORGANIC NATURE. I. THE STEAM-ENGINE. What is that known as magnetism. When a.