| 摘要 |
A nomographic apparatus for providing solutions to a mathematical relationship has a panel and several scales along three axes on a surface of the panel, the scales being arranged and calibrated in a nomographic relationship so that values on a straight line intersecting the scales satisfy the mathematical relationship. Guides are adjacent two selected ones of the scales, the two selected scales being separated by at least one other scale. First and second sliders are movable along the guides and strings extend between the sliders in substantially straight lines. The first and second sliders are positionable so that the strings intersect first and second locations on the selected scales, the locations representing selected numerical values of the mathematical relationship. As a result, a third value of the mathematical relationship is readable adjacent the other of the scales.
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