In addition to these traditional scientific instruments Hartmann also made gunner's levels and sights. He also been credited by Levinus Hulsius as the inventor of the Gunner's Gauge.[1]
References
edit- ↑ Pastorino, Cesare (2020). "Johannes Kepler and the Exploration of the Weight of Substances in the Long Sixteenth Century". Early Science and Medicine. 25 (4): 328–359. ISSN 1383-7427.
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