First Six Books of the Elements of Euclid

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Such is the expedition of this enticing mode of commu nicating knowledge, that the Elements of Euclid can be acquired in lefs than one third the time ufually employed, and the retention by the memory is much more permanent; thefe facts have been afcertained by numerous experiments made by the inventor, and feveral others who have adopted his plans. The particulars of which are few and Obvious; the letters annexed to points, lines, or other parts of a dia gram are in faet but arbitrary names, and reprefent them in the demonfiration; infiead of thefe, the parts being differ ently coloured, are made B to name themfelves, for their forms in correfpond ing colours represent them in the demonf'tration.