David Eugene Smith & George Wentworth 
Wentworth’s Solid Geometry 

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. The authors are indebted to many friends of the Wentworth Geometry for assistance and encouragement in the labor of preparing this edition, and they will welcome any further sug gestions for improvement from any of their readers.