US Patent No. 867,138, granted September 24, 1907 to Datiko Kaukasieli of West Berkeley, California, for a silkworm-breeding device. The apparatus is a molded plate-shaped hatching enclosure made from sheep and cow manure, with sinuous channels leading outward to feeding and maturing enclosures with cornstalk floors. The text explains the rationale of moving worms between zones and having them crawl over undulating surfaces to reduce mortality, and gives six claims. A drawing sheet shows a plan view and a section.