Perimeter – Priestly Smith
The perimeter is an instrument for accurate charting of the field of vision. It consists of. A vertical stand on which a metallic arc is pivoted. It also bear a circular black disc to read the meridian in which the arc in shape of a semicircle with radius 330 mm. Its rotating in any direction […]
Perimeter Priestly Smith
PERIMETER PRIESTLEY SMITH:- The perimeter is an instrument for accurate charting of the field of vision. It consists of. A vertical stand on which a metallic arc is pivoted. It also bear a circular black disc to read the meridian in which the arc in shape of a semicircle with radius 330 mm. Its rotating […]