Cyclopedia of textile work : a general reference library on cotton, woolen and worsted yarn manufacture, weaving, designing, chemistry and dyeing, finishing, knitting, and allied subjects (1911)
American School (Lansing, Ill.) · Chicago : American school of correspondence · leaf 272
lly percolates through it. After thefilter bed has been in use for some time, a thin deposit of silt andorganic matter deposits upon the upper surface and graduallycoats each individual grain of sand in the upper layer. Thisupper layer filters out all mechanical impurities present in thewater and… … Fig 79, Water Filter several weeks, but with proper care it can then be used for a longtime. This method of filtration is extensively used for the purifi-cation of drinking water in large cities, but less frequently in in-dustrial establishmients. The American system aims to produce, by artificial…
Textile fabrics · Textile industry
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
