Artifact Details Title Gilson circular slide rule Catalog Number X131.82 Type Physical object Description Circular slide rule with logarithmic scale, sin and tan scale, and fraction scale on the front. The back is divided into quadrants, each inscribed with the sign to be applied to a trigonometric function whose angle happens to be in that quadrant. Date ca 1940 Manufacturer Gilson Slide Rule Company Place Manufactured Niles, MI, USA Dimensions overall: 1/2 in x 3 1/2 in x 3 1/2 in Category Pre-computer/slide rule Credit Gift of Stanton Vanderbilt Lot Number X131.82 Related Records 102675451 Gilson Slide Rule