Mundus Subterraneus, in XII libros digestus; quo divinum subterrestris mundi opificium, mira ergasteriorum naturæ in eo distributio, verbo pantámorphou Protei regnum, universæ denique naturæ majestas (1665)
Joannem Janssonium · leaf 48
ore gravi Centrum gravitatis■^confiftit in linea diredtionis, & juxtaeamniovetur, itaut Centrum gravitatis ipfam li-neam diredioms motu fuo defcribat; cumenimomnes partes gravis ad Centrum gravi-tatis comparatae aequiponderent, neceflariomedium gravis pun&um lineam directionisconftituet,… … vitatis C motu fiio in D defcribere iineantC D, quae eft linea diredtionis, puncta verbA B terminantia corporisdefcribere lineas A E tcB F, lineae directionis C Dparallelas quidem in fuper-ficie terrae, concurrere ta-men circa Centrum Mun-di , uti & omnium partium ! corporis…
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![An illustration from Epytoma Ioa[n]nis de Mo[n]te Regio in Almagestu[m] Ptolomei](https://img.insideoutlibrary.com/img/200/ia-EpytomaIoannisd00Regi-48-1.webp)
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-376-43.webp)
