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An Assortment of Sieves

In preparing soils, Mr Burbank sometimes wishes to use very finely pulverized sand or loam, and sometimes a pebbly soil of much coarser consistency. An assortment of screens enables him to get just the kind of soil he wants.

An Assortment of Sieves

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 12 Chapter 1