Beds, 372. Flute, 308. Flying-machines, 348. Fly-wheel, use of, 249. Spectrum, colours of, 230. Speed governors, 67, _68_, _69_; Hartwell, 70; marine, 71. Speed of motor cars, 110. Spot, blind, in eye, 251. Zech, Jacob, 414. Zeiss field-glasses, 260. THE END. APPENDIX. THE CRIMINALS OF THE ENGINE. The.