A Collection of Sieves
These sieves are, of course, merely fine screens conveniently framed, so that they can be used to fill boxes or plots of various sizes. The small ones are particularly suitable for use in the greenhouse and with the small "flats" in which most of Mr. Burbank's seeds are planted.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 12 Chapter 1