Friday, September 26, 2014

A strong and substantial easel may be made at home with very little expense and no great difficulty. Smooth down with a plane, four pieces o...

Friday, September 19, 2014

Thursday, September 18, 2014

The sundial is an instrument for measuring time by using the shadow of the sun. They were quite common in ancient times before clocks and wa...

Wednesday, September 17, 2014