On an Improved Heliostat Invented by Alfred M. Mayer

A. G. Mayer

doi:10.2475/ajs.s4-4.22.306

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Mayer, A. G. (1897). On an Improved Heliostat Invented by Alfred M. Mayer. American Journal of Science, s4-4(22), 306–308. https://doi.org/10.2475/ajs.s4-4.22.306

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