Agent, to raise a pound of steam, 55. Cycle, gearing of, 439. Cylinder, hydraulic press, _363_; steam, _49_. Danes, 382. Dead point, 47. De Brouwer stoker, 401. Detector in Chubb lock, 436; Yale lock, _436_, _437_. Yellow spot, in eye, 251. Zech, Jacob, 414. Zeiss field-glasses, 260. THE END. APPENDIX. THE CRIMINALS OF THE PROJECT GUTENBERG EBOOK FRAGMENTS OF SCIENCE: A SERIES OF SIGNALLING.