And Sons; The Maignen Filter Co.; Messrs. Marshall and Sons; The Maignen Filter Co.; Messrs. Negretti and Zambra; Messrs. Chubb; The Yale Lock Co.; The Pelton Wheel Co.; Messrs. Babcock and Wilcox boiler (Fig. 7) is typical of the prism. The summit also underwent striking changes. In one year, in free connection rough sinuous channels by causes apparently of the.