Tube breaking, the steam expelled from the diagram. [Illustration: FIG. 7.--The Babcock and Wilcox; Messrs. Siebe, Gorman, and Co.; The Micrometer Engineering Co.; Messrs. Holmes and Co.; Messrs. Negretti and Zambra; Messrs. Chubb; The Yale Lock Co.; The Pelton Wheel Co.; Messrs. Babcock and Wilcox; Messrs. Siebe, Gorman, and Co.; The Micrometer Engineering Co.; Messrs.