68 Report on the Agricultural Implements at 
Fig. 56. — Ralladai/s Patent Wind-Mill stopped by a gale. 
Fig. 57. — Mechanism of Ralladays Patent Wind-Mill. 
the mill is stopped or checked ; but so soon as the velocity decreases the 
balance weight comes into play again, the sections assume their ^original 
position, or at least catch some of the wind, and the consequence of this self- 
regulation is that this mill works steadily in a comparatively high wind, 
when other mills have to be stopped. The foregoing illustrations (Figs. 
55 and 56) show the appearance of the mill at work and when stopped by a 
gale. The construction of the engine will be better understood from the pre- 
