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Athanasius Kircher . Ars Magna Lucis et Umbrae . The Great Art of Light and Shadow . 1646

Athanasius Kircher . Ars Magna Lucis et Umbrae . The Great Art of Light and Shadow . 1646

Athanasius Kircher . Ars Magna Lucis et Umbrae . The Great Art of Light and Shadow . 1646

mechanical calculating machine . George B. Grant . 1877

first pocket calculator . 17th century

The calculating machine of Leupold-Braun-Vayringe . 1736

Athanasius Kircher . Mundus subterraneus . Amsterdam . 1682

Sciathericon microcosmicum from 'Ars Magna Lucis et Umbrae' by Father Athanasius Kircher . 1646.

Polynesian Stick Navigation Chart

Early Egyptian water clock . 1415-1380 BC.

beaker water clock

Napier's bones / rods multiplier . John Napier . 1617

Abd ar-Rahman as-Sufi . Liber locis stellarum fixarum . 964 . Cancer