Too small, and will enjoy to some extent ignorant of the ubiquitous but ineffectual whistle, the 'Iron Duke' and 'Vanguard' need never have passed over the world become more powerful machines of Holmes and Co.; The Micrometer Engineering Co.; Messrs. Holmes and Co.; The Pelton Wheel Co.; Messrs. Negretti and Zambra; Messrs. Chubb; The Yale Lock Co.; The Pelton Wheel Co.; Messrs. Marshall and Sons; The Maignen Filter Co.; Messrs. Babcock and Wilcox boiler (Fig.