Early Technology Catalogue: Geology and Earth Sciences

Items in this category

• Duboscq Goniometer Sold
• Fuess Heliostat 1879 Sold
• Heliostat by Hilger
• Heliostat by Silbermann 1843
• Heliostat or Coelostat by Prazmouski Sold
• Nineteenth Century German Mineralogical Prospecter's Kit Sold

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