Publisher's Synopsis
Excerpt from Elements of Plain and Spherical Trigonometry: Together With the Principles of Spherick Geometry, and the Several Projections of the Sphere in Plano
By Rule: contrived to help tire Memory, retain a tbz'ng a great while, efiecia?y if Praéfice make it ready and firmiliar to him 5 yet 71's, I think, much better, in order to prevent Mi?ake: or Blem dert; or to avoid being pug led with form Dificultie}, whick eitber the Nature of.
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