. Water & sewage works . he American Sewer Pipe Co.,Akron, Ohio. Lewis McNutt, Brazil, Ind.,can also supply them. Standard Specifications You would oblige me greatly by letting meknow where I could secure A. S. M. T. andS. P. S. standard specifications for differentkinds of pavements. B., Montreal, Can. Standard specifications of the Associa-tion for Standardizing Paving Specifica-tions can be obtained from .Tohn B. Hit-tell, secretary. Street Department. Chica-go, III., and will cost $5. The specificationsof the American Society of Municipal Im-provements are scattered through two orthree of
. Water & sewage works . he American Sewer Pipe Co.,Akron, Ohio. Lewis McNutt, Brazil, Ind.,can also supply them. Standard Specifications You would oblige me greatly by letting meknow where I could secure A. S. M. T. andS. P. S. standard specifications for differentkinds of pavements. B., Montreal, Can. Standard specifications of the Associa-tion for Standardizing Paving Specifica-tions can be obtained from .Tohn B. Hit-tell, secretary. Street Department. Chica-go, III., and will cost $5. The specificationsof the American Society of Municipal Im-provements are scattered through two orthree of the annual volumes of the pro-ceedings, but the secretary, A. P. Polwell,50 Union Square, New York City, N. Y.,can send separate copies of the specifica-tions tor asphalt, wood block and latest volume of proceedings, whichcosts one dollar, contains the specifica-tions which have been adopted for con-crete pavements, cement sidewalks, curband gutter, and for sewers, which havenot yet been adopted. September^ WIS. WORKERS INTHE FIELD Fixed Carbon Not a Proper Test for Asphalts and Bituminous Road Binders The Editor of Exgineebing: Sir—The question has often been askedby city and state engineers, as well asmany producers of excellent asphalt andbituminous cements and road binders,what, if anything, has fixed carbontest to do with the quality of these prod-ucts for pavement and road construction?The answer is that it has nothing to dowith the qualities of these materials. Fixed carbon is not a definite sub-stance or quality in any given coal orother material. It constitutes the resultsof an arbitrary test of the approximateportion of coal which will remain andcontinue to burn and give heat afterrelatively light, volatile hydrocarbonshave been partially burned away byflame. This test was devised solely forcoal, by the committee on coal analysisof the American Chemical Society, andpublished in the Journal of the Ameri-can Chemical Society, 1899, No. 21,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsewerage, bookyear191
