Slide rule

2 foot slide rule with additional paper scale on reverse, marked with manuscript divisions & "UT" & ST" From RGO

Object Details

ID: ZBA0631
Type: Slide rule
Display location: Not on display
Creator: Troughton & Simms
Date made: circa 1875
People: Royal Greenwich Observatory; Troughton & Simms
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 7 mm x 605 mm x 45 mm