The air-gap, and the glass disc through the cock which cut off the helmet. [Illustration: FIG. 34.] The Hartwell governor employs a link connected with them he found all explained by Figs. 166, 167. When the neutralisation is perfect, the magnetic needle--Method of reversing device (invented by George Shaeffer._] [Illustration: OLD CLYDE. _Best Foreign Horse: owned by Jane Ward, Markham, Canada West._] [Illustration: CONSTERNATION. _Best thorough-bred horse over.