Bombyx mori their lifecycle, and enclose themselves in a cocoon made up of raw silk produced by the salivary glands. The final molt from larva to pupa takes place within the cocoon, which provides a vital layer of protection during the vulnerable, almost motionless pupal state. Many other Lepidoptera produce cocoons, but only a few—the Bombycidae, in particular the genus "Bombyx", and the Saturniidae, in particular the genus "Antheraea"—have been exploited for fabric production. If the animal is allowed to survive after spinning its cocoon and through the pupal phase of its lifecycle, it releases proteolytic enzymes to make a hole in
Mori Ōgai case. Mori Ōgai discovered the cause of the beriberi disease and managed to create a foundation to build a remedy, but the problem was only resolved after his death. He was appointed director of the Imperial Museum when he retired in 1916. Mori Ōgai then died of renal failure and pulmonary tuberculosis six years later, aged 60. Although Mori did little writing from 1892 to 1902, he continued to edit a literary journal ("Mezamashi gusa", 1892–1909). He also produced translations of the works of Goethe, Schiller, Ibsen, Hans Christian Andersen, and Hauptmann. It was during the Russo-Japanese War (1904–05) that