Pair of Darwin gimbal mirrors

Pair of Darwin gimbal mirrors, by Cambridge Scientific Co., 1916, used to track balloons

Details

Category:
Meteorology
Object Number:
1919-270
Materials:
metal and glass
Measurements:
mirror: length 152 mm
mirror: width 152 mm
overall: length 265 mm
overall: width 280 mm
overall: height 360 mm
slit mounting: height 476 mm
pouch (closed): length 175 mm
pouch (closed): width 85 mm
type:
mirrors
credit:
Ministry of Munitions