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logarithmic scale

logarithmic scale

1800-1805
One of three extra scales

One of three extra scales

One of three extra scales

One of three extra scales

Universal computing scale, length 19 inches

Universal computing scale, length 19 inches

One of three extra scales

One of three extra scales

Computing scale

Computing scale

Universal computing scale, length 19 ins, with 3 extra scales (two boxwood, one ivory) each 17 ins. long

Universal computing scale

1876
Computing scale, 19 inches long with horn sheet 5 3/4 inches by 9 inches, ruled; and small drawing (plan)

Computing scale with horn sheet, ruled, and small drawing (plan)

1876