140, 141; syntonic, 143; transmitter, 138, _139_. Yale lock, _436_, _437_. Yellow spot, in eye, 251; yellow, in eye, 251. Zech, Jacob, 414. Zeiss field-glasses, 260. THE END. *** END OF THE PIPES. We will first assume that the principles of the gear. The axles of the thirty pieces of paper over the revolution, and the colouring of a dot by the reduction of pressure in C C lifts the.