The old community kitchen gardens (acres of them) required many workers, young and old, as they were large. Many tools such as the SIEVE, were made of wood and separated seeds from the chaff of the plant. The screen was made wood and of ho...rsehair or wire. Several people raised and saved seeds for vegetables whose seeds could not be easily found in seed catalogues. The seeds were saved and used for the following years crop, including flat green beans, Ebenezer(NY) onions, summer radish, also Schwartzwurztel, Eier salat and more. These plants were said to taste better than commercial seeds. These screens were very useful and much needed tools in gardening.