An introduction to geometry upon the analytical plan
A school geometry and plane trigonometry textbook by Frank Herbert Loud, published in St. Louis by G. I. Jones and Company in 1880 for American students. Its plates are fold-out sheets of numbered line diagrams — triangles, parallelograms, circles with radii, cones, prisms and cylinders — thin-ruled with lettered vertices, useful as ready-made technical line art and grid-like plate layouts.
