The trissotetras: or, a most exquisite table for resolving all manner of triangles, whether plaine or sphericall, rectangular or obliquangular, with greater facility, then ever hitherto hath been practised: most necessary for all such as would attaine to the exact knowledge of fortification, dyaling, navigation, surveying, architecture, the art of shadowing, taking of heights, and distances, the use of both the globes, perspective, the skill of making the maps, the theory of the planets, the calculating of their motions, and of all other astronomicall computations whatsoever. Now lately invented, and perfected, explained, commented on, and with all possible brevity, and perspicuity, in the hiddest, and most re-searched mysteries, from the very first grounds of the science it selfe, proved, and convincingly demonstrated. / By Sir Thomas Urquhart of Cromartie Knight. Published for the benefit of those that are mathematically affected.

BEing certainly perswaded, that a great many good spirits ply Trigonometry, that are not ver∣sed in the learned Tongues, I thought fit, for their encouragement, to subjoyne here the ex∣plication of the most important of those Greek, and Latin termes, which, for the more efficacy of expression, I have made use of in this Treatise: in doing whereof, that I might both instruct the Reader, and not weary him, I have endeavoured perspicuity with shortnesse: though (I speak it ingenuously) to have been more prolixe therin, could have cost but very little labor to me, who have already bin pret∣ty well versed in the like, as may appear by my Etymolo∣gicall dictionary of above twenty seven thousand proper names, mentioned in the Lemmas of my severall Volums of Epigrams, the words whereof are for the most part abstru∣ser, derived from moe Languages, and more liable to large, and ample interpretations. However (caeteris paribus) brevity is to be preferred; therefore let us proceed to the Vocabulary in hand.