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jacques canivet(1714 – 1773)

Discover Jacques Canivet, a renowned French scientific instrument maker (1714-1773). Explore his compasses, quadrants, and astronomical tools crafted in Paris.

马德里海军博物馆 (马德里, 西班牙)

在马德里海军博物馆探索西班牙的海事遗产!在这里,您可以发现令人赞叹的馆藏、精美的彩绘玻璃屋顶以及宏伟的建筑艺术,尽情领略从文艺复兴时期到现代的海事历史变迁。

This instrument is used to identify horizontal lines in topography and geodesy, the latter meaning the study of the shape and size of the Earth and the positions of points on or above its surface. It has a solid metal frame on which there are 2 eyepieces, with their horizontal lines of vision arranged so that each corresponds to the lens of the other. The upper section has a suspension point and plumb line, while the lower section has a silver arc on which degree increments are engraved. When the wire crosses the center of the scale, the eyepiece optical axes are perfectly horizontal.

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