Chicago : Engineering and Contracting Pub. Co. · leaf 92
00 ft. below the bedof the stream. This work was done with a2%-iri. testing auger with sleeves to bring upall material cut. All samples showed that thematerial was very compact to the full depthof the holes, consisting of stratum of hardblue clay, gravel, light brown earth of sandand clay, and…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
