LITTLE KNOWN FACTS ABOUT HWGACOR.

" An experiment by using a drinking water-stuffed glass sphere was carried out and al-Farisi showed the extra refractions mainly because of the glass could be disregarded in his design.[74][c] As he pointed out in his Kitab Tanqih al-Manazir (The Revision on the Optics), al-Farisi employed a big distinct vessel of glass in The form of the sphere, w