Beruniy’s Theory of Shadows

The great encyclopedic of the Middle Ages Abu Raihon Muhammad ibn Ahmad al-Beruniy, who had been famous with the pseudonym "Ptolemy". Measuring the Distance on the Ground and the Height of a Mountain. The Distances between the Celestial Bodies. 14 pages.Measuring the Distance on the Ground and the Height of a Mountain
Measuring of the Earth
The Distances between the Celestial Bodies