| | | | sample. Hamburg | 0.30 | 2.0 | 0.90 |Same, after washing | | | | drums. Hamburg | 0.34 | 2.3 | 1.50 |Same, after washing | | | | ejectors. Altona | 0.32 | 2.0 | 9.00 |Dirty sand, old | | | | filters. Altona | 0.37 | 2.0 | 1.50 |Same, after washing. Altona | 0.33 | 2.8 | 0.50 |Washed sand for new | | | | filters. Berlin, Stralau | 0.33 | 1.9 | 12.20 |Dirty sand-pile. Berlin, Stralau | 0.35 | 1.7 | 4.50 |Filter No. 6, | | | | 3″ below surface. Berlin, Stralau | 0.34 | 1.7 | 6.30 |Filter No. 7, | | | | 3″ below surface. Berlin, Stralau | 0.35 | 1.7 | 4.00 |Filter No. 10, | | | | 3″ below surface. Berlin, Tegel | 0.38 | 1.6 | 11.00 |Dirty sand, old | | | | filters. Berlin, Tegel | 0.38 | 1.5 | 2.80 |Same, after washing, | | | | old filters. Berlin, Tegel | 0.35 | 1.6 | 3.20 |Same, after washing, | | | | new filters. Berlin, Müggel | 0.35 | 1.8 | 0.80 |Sand from filters | | | | below surface. Berlin, Müggel | 0.33 | 2.0 | 6.30 |Dirty sand, ordinary | | | | scraping. Berlin, Müggel | 0.34 | 2.0 | 15.30 |Dirty sand, another | | | | sample. Charlottenburg | 0.40 | 2.3 | 7.20 |Dirty sand. Chemnitz | 0.35 | 2.6 | 0.20 |New sand not yet | | | | used. Magdeburg | 0.39 | 2.0 | 9.50 |Dirty sand. Magdeburg | 0.40 | 2.0 | 2.80 |Same, after washing. Breslau | 0.39 | 1.8 | 1.40 |Normal new sand. Budapest | 0.20 | 2.0 | 0.80 |New washed Danube | | | | sand. Zürich | 0.28 | 3.2 | 6.20 |Dirty sand. Zürich | 0.30 | 3.1 | 1.50 |Same, after washing. Hague | 0.19 | 1.6 | 0.70 |Dune-sand used for | | | | filtration. Schiedam | 0.18 | 1.6 | 5.60 |Dune-sand used for | | | | filtration; dirty. Schiedam | 0.31 | 1.5 | 13.50 |River-sand; dirty.