The soil for these may be somewhat coarser, and the amount of drainage material more ample.
The greatest progress has been made in the manufacture of cotton fabrics, principally of the plainer and coarser grades used by the common people.
Where the soil grains are quite free from each other the smaller grains tend to fill up the spaces between the larger ones; hence it might be concluded that in clays the amount of pore-space would be less than in coarser sands.
Coarser straw hats are made at other places, as well as hammocks, baskets, &c.
Similar effects are produced along the boulder-clay cliffs of the Baltic. Where the force of the waves on the beach produces its full effect the coarser material gets worn down to gravel, sand and silt, the finest particles remaining long suspended in the water to be finally deposited as mud in quiet bays.