F.225 Data Sheet 225

Palmer, Palmer’s Computing Scale, 1843-1844

Serial Number or Date Stamp:

Country: USA Primary construction material: pp Case included?: no

Length of 1 decade = 27 in, and overall scale length = 27 in. The largest physical dimension is 11 in.

Front Scales: D [ C ]

Back Scales:

Notes: First Issue of Palmer’s scale; first logarithmic calculating scale designed, manufactured, and sold in USA; original finger button for turning the disc

References: Cajori, History of the Logarithmic Slide rule, p61 (1909); JOS 3.1 p9; JOS 4.1 p5

Date Acquired: 11/14/2022