SubjectMeasurementItem typeObjectPhysical materialSilverObject typeRulerInventory No68695DescriptionCross-linkedRelated ItemsMore related itemsParallel Ruler, English, 18th CenturyInventory Number 86038Parallel Ruler, 18th CenturyInventory Number 36915Parallel Ruler, 19th CenturyInventory Number 93896Plotting Parallel Ruler, English, c. 1750Inventory Number 46823