Gunter's line of numbers
||GB#B4 B50.79 on white sticker on back of rule
1/8 x 24 x 2 3/4 in.
Wooden ruler with navigational scales on one side and logarithmic (the "Gunter's line of numbers) on the other.
Hand calculation; Logarithm; Analog; Slide rule; Oughtred, William
Gwen Bell artifact and book collection
Gift of Gwen and C. Gordon Bell