It was based on the pica size most extensively in use in this country.
Replaced in California west of the Sierras by Pica nuttalli.
Pica gages are scales marked off in units of 12-point (and half, or 6-point).
These are made in lengths of one yard and in sizes of 6-point (nonpareil), 12-point (pica), and 18-point.
The mother, whose name was Pica, may have been of Provenal ...