Gnomonice Andreae Schoneri Noribergensis, hoc est, De descriptionibvs horologiorvm sciotericorvm omnis generis, proiectionibus circulorum sphaericorum ad superficies, cum planas, tum conuexas concauasq[ue], sphaericas, cylindricas, ac conicas, item delineationibus quadrantum, annulorum, &c. libri tres (1562)
fsime iic UirjDiufta ut prius declinationis linea A F fufcipiatur meaf p untfum.e quo normalis ipfi B C emi(Ta,fecet ipfatnin G figno. Quantitas recTtai A P numeretur in B C ab A in 1 , fado<2$ i centro ducatur quadrans circuli, quodiuifoin nonaginta partes aequales numeretur a BC altitudo poli,… … quocp P ipfi D E aequabilis PR defchbatur,Nunc quantitas A L nume- retur ex A fuper A <j,pundlu fecSfonis ducatur refla iun diis A & O pundis.Poftea ex I ducatur aequabilis ipfi DE, quae fit Ia, fecans e K ipfi B C tcquidillantem in at, Ex a autem ut centro pro ratione reda;
Sundials -- Early works to 1800
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Gnomonice Andreae Schoneri Noribergensis, hoc est, De descriptionibvs horologiorvm sciotericorvm omnis generis, proiectionibus circulorum sphaericorum ad superficies, cum planas, tum conuexas concauasq[ue], sphaericas, cylindricas, ac conicas, item delineationibus quadrantum, annulorum, &c. libri tres, 1562, leaf 48](https://img.insideoutlibrary.com/img/1024/ia-gri_33125009484227-48-0.webp)
![An illustration from Incipit liber primus[-quartus] Elementorum litterarum (1526)](https://img.insideoutlibrary.com/img/200/ia-incipitliberprim00veri-48-0.webp)
