This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Huygens Horologium oscillatorium sive De motu pendulorum ad horologia aptato demonstrationes geometricae .jpeg Book Huygens Christiaan Horologium oscillatorium sive De motu pendulorum ad horologia aptato demonstrationes geometricae apud Muguet regis illustrissimi archiepiscopi typographum vi Cithar ad insigne trium Regum Parisiis