This set includes three brass pieces; a protractor, a straight ruler, and an “L”-shaped ruler. The protractor is marked with degrees and radiating lines. Measures approximately 3.75” wide by 2.6” tall. Straight ruler is interesting as it has a different measure on each side. It is engraved “1/2 English Foot” with lines of measure (6 inches) on one side and “1/2 Paris Foot” with similar lines and a slightly longer measure on the opposite side. The “L”-shaped ruler is one sided with the “1/2 English Foot” measurements.

All three pieces are is very good condition with no bends. All have a mild tarnished color.

Historically the "foot" was a part of many local systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in length from country to country, from city to city, and sometimes from trade to trade. Its length was usually between 250 mm and 335 mm.  [jet] [ph:m]

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