eritanguli DEH , a^qualis per 2.$. primiEucl.ipfi FHE ; item etiam sequaiisad vcrcicem oppofici LEN per i^.pri-mi Eudid. Ergd LEN erit angulusrefraclionis tali incJinationi compe-tens, unde D E in ingreflu vitri proce-detabEinlN, eric ergo NIEHra-dius refiadus. Qu[a verd is perpen-dicularis efl ad… … CoroHa- Syntagma t Caput VIL Corollarium^ Si femidiameter conTexicatis fLicrit minor triplo fcmidiametn coftca- ^admscda-Titatis, foci vircualis diftantia major eric triplo eoncavicatis. Utricen- ^^^trum convexitacis ellec incer H& F, veluc in M, perpendicularis i ccntro fdiuonca!^M duda per…
Optics, Geometrical · Optical instruments
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