Engineering and Contracting . R. Gaz., March 13, 1908; 2% pp. A discussion of formula for curve eleva-tion, based on the assumption that the re-sultant of the centrifugal force and theweiglit of the locomotive and car must fallwithin the middle third of the space betweenthe two rails of the track. Six general con-clusions are deducted from the discussion: Handbook of Cost Data, By HALBERT P. QILLETTE,M. Am. Soc. C. E. Editor Engineering-Contracting Cost Data has broken all rec-ords for the sale of technical 10,000 copies were sold in lessthan two years; 1,600 in last threem
Engineering and Contracting . R. Gaz., March 13, 1908; 2% pp. A discussion of formula for curve eleva-tion, based on the assumption that the re-sultant of the centrifugal force and theweiglit of the locomotive and car must fallwithin the middle third of the space betweenthe two rails of the track. Six general con-clusions are deducted from the discussion: Handbook of Cost Data, By HALBERT P. QILLETTE,M. Am. Soc. C. E. Editor Engineering-Contracting Cost Data has broken all rec-ords for the sale of technical 10,000 copies were sold in lessthan two years; 1,600 in last threemonths. The book has over 600 pagesof actual costs taken from the privaterecords of engineers and contractors,and so itemized and analyzed as tobe of inestimable value to any per-son who has to do with making bidsand estimates or in checking esti-mates. This covers the whole field ofcontract work, giving the cost of la-bor and materials required for everykind of construction from the layingof sod to the building of reinforced. concrete sewers. No detail of con-tract work has been too small to bedescribed and recorded. Wages andprices of material are given in everycase, so that proper substitution canbe made where conditions differ. Itgives also valuable data on methodsof construction, thus enabling fore-man to handle work in the most eco-nomical manner possible. The general headings are: Cost-Keeping, Preparing Estimates,Organization of Forces, etc. Cost of Earth Excavation. Cost of Rock Excavation, Quarryingand Crusliing. Cost of Roads, Pavements and Walks. Cost of Stone Masonry. Cost of Concrete Construction, all kinds. Cost of Water-Works. Cost of Severs, Vitrified Conduits andTile Drains. Cost of Piling. Trestling. Timberwork. Cost of Erecting Buildings. Cost of Steam and Electric Railways. Cost of Bridge Erection and Painting. Cost of Ry. and Topographic Sur\-eys. Cost of Miscellaneous Structures. 24 Page Circular, showing Contents andSample Pages, will be mailed FREE onreq
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