Ancient and modern engineering and the Isthmian canal (1903)
Burr, William H. (William Hubert), 1851-1934 · New York, J. Wiley & Sons; [etc., etc.] · leaf 334
308 WATER-WORKS FOR CITIES AND TOWNS. latter having an aggregate area of a little more than one-half acre. A covered filter at Ashland, Wis., consisting of three beds of one- sixth acre each, cost at the rate of about $70,000 per acre. 243. Cost of Operation of Albany Filter. — The cost of operat-… … Fig. 12 — Regulator of Rate of Filtration. ing sand, refilling, incidentals, lost time, and washing the sand during seventeen months ending December 29, 1900, was $1.66 per million gallons filtered. The cost of removing the sand (ex-
Civil engineering · Canals, Interoceanic
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-28-6.webp)
