Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
The determination of sodium and potassium in silicate rocks by flame photometer / by W.W. Brannock and Sarah M. Berthold -- A photometric method for the estimation of the oil yield of oil shale / by Frank Cuttitta -- A volumetric method for the estimation of the oil yield of oil shale / by Frank Cuttitta -- The fluorimetric determination of aluminium in phosphate rock with 8-hydroxyquinoline / by F.S. Grimaldi and Harry Levine -- The determination of phosphorus in rocks containing vanadium / by R.B. Randolph and F.S. Grimaldi -- The probable error of a chemical analysis / by William G. Schlecht -- A confined-spot method for the determination of traces of silver in soils and rocks / by Hy Almond, R.E. Stevens and H.W. Lakin -- A photographic technique for showing some mineral relations / by Waldemar T. Schaller.