Name/Title
Sliding Ruler, Cover, and Paper InsertEntry/Object ID
2000.002.00163a-cDescription
Ruler with sliding features, and Chinese writing. Plastic cover that ruler fits inside. Paper insert which reads, "Instruction Manual for Human Physiological Rhythms Patent (Application) Number: 87301086, etc. Guangzhou [?] Technology Development Company Yiyuan, Haizhu Square, Guangzhou City, Guangdong Province, China".