---------------------+---------+--------+--------+-------------------- |Effective| | Albu- | |Size; 10%| Uni- | minoid | | Finer |formity | Ammo- | Source. | than | Coeffi-| nia. | Remarks. |(Milli- | cient. |Parts in| | meters).| |100,000.| ---------------------+---------+--------+--------+-------------------- London, E. London Co.| 0.44 | 1.8 | 0.45 |New sand, never | | | | used or washed. London, E. London Co.| 0.39 | 2.1 | 26.20 |Dirty sand, very | | | | old. London, E. London Co.| 0.37 | 2.0 | 8.60 |Same, washed by | | | | hand. London, Grand Junc. | 0.26 | 1.9 | 1.90 |Sand from rough | | filter. London, Grand Junc. | 0.40 | 3.5 | 10.00 |Old sand in final | | | | filter. London, Grand Junc. | 0.41 | 3.7 | 2.70 |Freshly washed old | | | | sand. London, Southw’k & V.| 0.38 | 3.5 | 5.00 |Freshly washed old | | | | sand. London, Southw’k & V.| 0.30 | 1.8 | 2.80 |Freshly washed new | | | | sand. London, Lambeth | 0.36 | 2.3 | 2.60 |Freshly washed old | | | | sand. London, Lambeth | 0.36 | 2.4 | 0.35 |New unused sand, | | | washed. London, Lambeth | 0.25 | 1.7 | 0.70 |New extremely fine | | | | sand. London, Chelsea | 0.36 | 2.4 | 2.10 |Freshly washed old | | | | sand. Middlesborough | 0.42 | 1.6 | 17.60 |Dirty sand, ordinary | | | | scraping. Middlesborough | 0.43 | 1.6 | 7.30 |Same, after washing. Birmingham | 0.29 | 1.9 | 33.20 |Dirty sand. Birmingham | 0.29 | 1.9 | 7.20 |Sand below surface | | | | of filter. Reading | 0.30 | 2.5 | 4.00 |Dirty sand. Reading | 0.22 | 2.0 | 1.50 |Same, after washing. Antwerp | 0.38 | 1.6 | 7.80 |Dirty sand. Antwerp | 0.39 | 1.6 | 3.40 |Same, after washing. Hamburg | 0.28 | 2.5 | 8.50 |Dirty sand. Hamburg | 0.31 | 2.3 | 0.80 |Same, after washing. Hamburg | 0.34 | 2.2 | 7.90 |Dirty sand, another