geography

What is mean by Prismatic- what is Prismatic body – is Prismatic color – Use of Prismatic Compass – what is the Use of Prismatic Compass- what is advantage of compass

Compass Prismatic compass is a simple instrument comprising an aluminum ring graduated to 30 minutes held at the top of a broad magnetic needle set in balance on a hard steel pivot. This compass is fitted in a circular metal box with a transparent glass cover. The glass – top is further covered with a […]