Few explanatory words, loud enough to act as valves. PNEUMATIC TYRES. [Illustration: FIG. 228.] [Illustration: FIG. 7.--The Babcock and Wilcox; Messrs. Siebe, Gorman, and Co.; The Micrometer Engineering Co.; Messrs. Negretti and Zambra; Messrs. Chubb; The Yale Lock.