09-003. Scottish, circa 1835, printed on the cylinder paper "McFARLANE'S, CALCULATING CYLINDER, GLASGOW." Made of paper covered turned mahogany, 6 3/8" long overall x 2 1/4" diameter, in 3 sections plus 2 threaded end pieces. There are two columns on the top section, one column on the center section, and three columns on the bottom section. The apparatus is designed facilitate calculations in interest on English money. This rare early cylindrical "ready reckoner" is in very good overall condition, with minor chipping of the paper scales at their edges. It is one of the earliest examples of a cylindrical calculating device. See #217 in Baxandall's "Calculating Machines and Instruments" for a description of one of the two examples in the London Science Museum Collection and page 9 in "A Calculator Chronicle" for a picture of the example in the IBM Collection (these are the only three examples that we can find in collection catalogs).
