Santa Maria Novella
Detail #15

East side of the support for the sundial slab showing the etchings on the church facade. The support reads

DILIGE'TI OBSERVATIONE PERSPECTA TROPICOP DISTANTIA G. XLVI.LVII.XXXIX.L. ET ANGULO SECTIONIS G. XXIII.XXVIII.XXXXVIIII.LV.

"By diligent perspective observation the distance between the tropics (is) 46o, 57 ', 39" ,50''' and the section angle is 23o, 28', 49'', 55'''. "

Ref: Egnatio Danti's Great Astronomical Quadrant by Maria Lusa Righini Bonelli and Thomas B. Settle, Istituto e Museo di Storia della Scienza-Firenze