Cary Co. London Station Pointer, Ministry of Defense Rolling Ruler- Boxed Set music Source: 1919 Tyco's Industrial Equipment

Source: 1919 Tyco's Industrial Equipment Catalog (page 74)

Circa 1870-1899

At this intersection the index hand will point to the relative humidity on the scale at the bottom of the chart

Late 19th to early 20th century wooden Chinese Diptych

This instrument works by adding a working liquid

Cary Co. London Station Pointer, Ministry of Defense Rolling Ruler- Boxed Set music Source: 1919 Tyco's Industrial EquipmentAntique late 19th Century Station Pointer by Cary Co. London sold with a Brass Maritime Rolling Ruler boxed set. Both included in their original wood cases. Station Pointer features a silvered brass 360 degree graduated scale. Used primarily for maritime navigation and surveying to calculate precise location. Station pointer does not include additional extension rods. Maritime Rolling Rulers were used primarily to draw parallel lines on navigational