isn't technology wonderful

Wet as predicted so catching up on paperwork as well as the day job. The substructure plans do not include enough dimensions for setting out the footings so we have been working out our key triangulation points by trigonometry and this morning I rechecked out the set out positions for the corners of the sunspace foundations by the use of the tangent tables, paper and pencil. My old mathematical tables - logs, sines, cosines and tangents amongst others have been used by both myself and my father when he was at school and at Uni and are Four Figure Mathematical Tables by Cargill G Knott D.Sc F.R.S.E. and dated 1905. That Maths A-level did come in useful after all....though the basic trig. was all done years before.

Obviously we all use the 345 triangle for 90 degree corners but for a dodecahedron sines and tangents are essential back up.