Explore Books on
middle point

A Rudimentary Treatise on the Principles of Construction in the Carpentry and Joinery of Roofs

By John Robison

An Elementary Treatise on Plane Trigonometry

By Ernest William Hobson ,C.M. (Charles Minshall) Jessop

A treatise on spherical trigonometry, by W.J. M'Clelland and T. Preston

By William John M 'Clelland,Thomas Preston