Prattica gnomonica, o vero, Tauole, con le quali ciascuno ageuolmente può far da sè gli horologi da sole orizontali, verticali, e riflessi di qualsiuoglia grandezza : calcolate à grado per grado di declinatione murale per sei altezze di polo, cioè da gradi 40 sino à 45
A 1669 Bologna treatise on sundial construction by Angelo Maria Colomboni, printed by the heirs of Domenico Barbieri, offering tables so readers could make horizontal, vertical and reflecting sundials themselves. The pictures are geometric diagrams in ink line: a dial circle with lettered points and hour numerals, rays drawn across gridded scales, and a boxed construction with a curved hour line, all useful for a designer seeking precise technical linework and mapped scale marks.
