Corpus of Electronic Texts Edition
An Irish Astronomical Tract (Author: [unknown])

Caibidil 18

Do med na greini .

Raciones geometrice etcetera.

.i. Derbaid resuin iomitrici Tolimeus astrolaic med na greine. Et adeir gorab egin cainndigacht na greine da beth comtrom no nis luda no nis mo re cainndigacht na talman; & da madh comtrom da beit grian & talam, da rachadh scail na talman .i. an aitchi , coimhletan risin talmain fein amac co speir na n-airdrinnach n-daingin & da mucfad si iat. Et da tigemad eclipsis .i. easbaidh soluis don re, gac en mi trit an m-bliadain amach, oir da boinfedh cainndigecht na talman noc de beth co mor re cainndigecht cuirp na greine10 solus na greine don re & do na h-airdrinnacaib & mar sin ni beit gealach co brac ann ac dorcadus siraidhi o tosach na haiti conuic a deredh. Ma sedh o bis an gealac ann & daciter na h-airdrinnaich co solus is in aithi, tuicter as so nac comtrom an grian & in talam re ceili.

Agus da chur a cell co follus daghen fidhair tri cercaill a timcill a celi .i. an cercall leitimillech amail cercall na n-airdrinnac n-daingin, & an cercall medonac mar cercall na greine, & an cercall as lugha mar cercall an re & an talam ar a lar & in grian fon talmain this 'na speir fein, coimlethan ris an talmain & scaile na talmain ar comair na greine don taeb eli don talman, coimlethan ris an talmain, ac dul amach co speir na n-airdrinnach co direach.

to face p. 84 (2)


p.86