Goldbeater's skin　牛の腸の外膜　intestina

l初期の気球の外皮や飛行船の気嚢の裏打ち材料

Locus Solus

[Notes on the Manufacture of Goldbeater's Skin]　

[A HISTORY OF THE LIVER, SPLEEN, AND GALLBLADDER]

Alexander Graham Bell

湿度計の感部　　羊皮紙の穴や裂け目を修繕