NODAL SLIDE ASSEMBLY
Consist of following items.
NODAL UPRIGHT: Consists of a combination of Single & double lens holder on a mounting rotating along the vertical axis. -The combination lens holders are adjustable in height and the single & twin Lens holders can either be moved together by rack & pinion or relative to each other by sliding. These motions are read by individual pointer on a mm scale. The whole mount can rotate along its vertical axis and the degree of rotation read on a circular scale with 3 steel C.P. stem.
MIRROR: Plain, inclinable with 3 steel C.P. stand.
OPTICAL SLIT: with fine machined cross slit, one surface white & the other optical black, with 3 steel C.P. stem.
LAMP HOUSE: An electric bulb is encased in a metal case with cord & pin. It works on 220 Volt.