The description and use of a quadrant : by which all the most usefull and necessary propositions of both the globes are easily and exactly performed, as the right ascension, declination, altitude, amplitude, rising, setting, azimuth, and houre of the day : also of a quadrat [sic] by which you may take all manner of heights & distances, as of towers, steepless, &c. : and lastly, of a nocturnal, for the ready finding of the houre of the night /