Horlogiographia optica. Dialling universall and particular: speculative and practicall. In a threefold præcognita, viz. geometricall, philosophicall, and astronomicall: and a threefold practise, viz. arithmeticall, geometricall, and instrumentall. With diverse propositions of the use and benefit of shadows, serving to prick down the signes, declination, and azimuths, on sun-dials, and diverse other benefits. Illustrated by diverse opticall conceits, taken out of Augilonius, Kercherius, Clavius, and others. Lastly, topothesia, or, a feigned description of the court of art. Full of benefit for the making of dials, use of the globes, difference of meridians, and most propositions of astronomie. Together with many usefull instruments and dials in brasse, made by Walter Hayes, at the Crosse Daggers in More Fields.
Morgan, Sylvanus, 1620-1693., Goddard, John, fl. 1645-1671, engraver.
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THE ARGVMENT OF THE Praecognita Philosophicall.
NOt to maintain with nice Philosophie,
What unto reason seems to be obscure,
Or shew you things hid in obscurity,
Whose grounds are nothing sure.
'Tis not the drift of this my BOOK,
The world in two to part,
Nor shew you things whereon to looke
But what hath ground by Art.
If Art confirm what here you read,
Sure you'l confirmed be,
If reason wonte demonstrate it,
Learn somwhere else for me.
There's shew'd to you what shadow is,
And the Earths proper place,
How it the middle doth possesse,
And how heavens run their race.
Resolving many a Proposition,
Which are of use, and needfull to be known.
