Inclined Plane (MC-1166)

On stable Iron base 45 x 15cms, 25 mm thick, hinged to wooden plane comprising two hardwood strips 48 x 6 cm, 20 mm thick, 20 mm apart rigidly joined at ends by metal crosspieces. A well balanced aluminium pulley 50 mm diameter on 150 mm long stem adjustable at any angle in a clamp on a strip with 50 mm extension, a metal scale fixed to plane edge and a combined angular and linear scale screwed to base with clamp which serves as an index.