Lepidoptera feathers and hair, bran, semolina and flour (possibly preferring wheat flour), biscuits, casein, and insect specimens in museums. Even though most butterflies and moths affect the economy negatively, some species are a valuable economic resource. The most prominent example is that of the domesticated silkworm moth ("Bombyx mori"), the larvae of which make their cocoons out of silk, which can be spun into cloth. Silk is and has been an important economic resource throughout history. The species "Bombyx mori" has been domesticated to the point where it is completely dependent on mankind for survival. A number of wild moths such
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