Summary
A simple and inexpensive instrument called a longitudimeter for measuring distances in microscopy was constructed from a precision map-measuring device and an electric lamp positioned eccentrically on a stand. A precision better than 1% was readily obtained in measurements of the perimeters of trabecular surfaces in cancellous bone.
Mixed-image longitudimetry was devised for length measurements in cancellous bone, but the method seems suitable for a wider application in quantitative microscopy.
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Sudmann, E. Mixed-image longitudimetry: A new method of length measurement in microscopy. Calcif Tissue Int 27, 27–32 (1979). https://doi.org/10.1007/BF02441157
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DOI: https://doi.org/10.1007/BF02441157