This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1912 Excerpt: ... GREGORY, JOHN H. Automatic modules for regulating the speed of filtration. LI, 145. Filtration of water. LIII, 250. Filtration works. L, 456. Lawrence, Mass., Filter. XLVI, 349. Sewage disposal. LVII, 128. "The Improved Water and Sewage Works of Columbus, Ohio." LXVII, 206. Water filtration at Washington, D. C. LVII, 445. Water-works pumping engines. LXXIV, 32. GREGORY, W. B. Dredges: Their construction and performance. LIV, Part C, 508. Efficiency of centrifugal pumps. LVI, 159. Pumping machinery. LIV, Part D, 546. "Tests of Creosoted Timber." LXX, 37. GREINER.J. E. Elevated railroads. XXXVII, 400. Live loads for railroad bridges. LIV, Part A, 92. Movable bridges. LX, 305. Overloaded bridges. LVII, 263. Painting of iron structures. Xaxiii, 551. "Progress Report of Special Committee on Concrete and Reinforced Concrete." LXVI, 431. Railroad location. XXXI, 113. "Recent Tests of Bridge Members." XXXVIII, 41. Specifications for structural steel. XXXIII, 390. Suspension bridges. XXXVI, 467. "The American Railroad Viaduct.--Its Origin and Evolution." XXV, 349-The Launhardt formula and bridge specifications. XLI, 218. "The Reconstruction of the Baltimore and Ohio Railroad Bridge over the Ohio River, at Benwood, West Virginia." LV, 146. Train loadings for bridges. XXXI, 205. Treatment of metals for structural purposes. XXX, 659. "What is the Life of an Iron Railroad Bridge?" XXXIV, 294. GRIBBLE, T. G. "Street Railway Track." XXIV, 80. GRIDLEY, VERNON HALL. Memoir of. XXXVI, 595. GRIFFEN, JOHN. "Experiments upon Phoenix Columns." XI, 1. "Loads and Strains on Bridges." II, 93. GRIFFIN, MARTIN L. "Some Remarks on the Chemistry of the Processes of Lime Sulphite Fiber Manufacture." XX, 281. GRIFFIN, P. H. "Sections and Mechanical Conditions of Car Wheels." XXV, 23. GRI...