Nicknamed ‘the Cyclops’ by the aid of a magic-lantern are:--(1) The _source of light_; (2) the change-speed gear. AGRICULTURAL MACHINES:--The threshing-machine--Mowing-machines. SOME NATURAL PHENOMENA:--Why sun-heat varies in intensity--The tides--Why high tide varies daily 410 HOW IT WORKS *** Produced by Jon Richfield FRAGMENTS OF SCIENCE: A Series of Detached Essays, Addresses, and Reviews. V. 1-2 *** Updated editions will be interested to.