His regular visitors, or correspondents, included Peiresc, Gassendi, Descartes, Roberval, Beeckman, J B van Helmont, Fermat, Hobbes, Etienne Pascal, and his son Blaise Pascal . He set up meetings of scholars from around Europe during which they would read and review scientific papers, both national and international, exchange contacts with other scholars and plan and discuss experiments and other work.
Kanyang regular na mga bisita, o Koresponsal, kasama Peiresc, Gassendi, Descartes, Roberval, Beeckman, JB van Helmont, Fermat, Hobbes, Etienne Pascal, at ang kanyang anak na lalaki Blaise Pascal. He set up ng mga pulong ng mga iskolar mula sa paligid ng Europa sa panahon na kung saan sila ay basahin at suriin ang mga papeles pang-agham, parehong nasyonal at internasyonal, exchange contact sa iba pang mga iskolar at mga plano at pag-usapan ang mga eksperimento at iba pang mga gawain.