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Electro-plating with a hand generator, owing to absence of mains current, at the Scientific Apparatus Supply Service factory, Chengdu, Sichuan, 1943. Used by permission.

Chappe d'Auteroche, abbé. Voyage en Sibérie, vol. 1. Paris: Debure, pere, 1768. The covers of this volume were detached. In order to provide support for the book during exhibition, the covers were reattached by a method called board…