Volvelle 展示了如何用小时和分钟计算月球到达其某一相位的时间。圆盘是固定的,通过中心的导线读取时间(Volvelle to show how to find the time, in hours and minutes, in which the Moon reaches one of its aspects. The disc is fixed and is read by a wire in the centre)彼得·阿皮亚努斯(Peter Apianus) |
€ 121.36
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日期不详 · hand-coloured engraving
· 图片ID: 1508915
National Maritime Museum, London, UK / Bridgeman Images |
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