'The Fournier scale: two inches in total, divided into four half-inches, the medium intervals are one line (​¹⁄₁₂inch), and the smallest intervals are ​¹⁄₃₆ inch; no intervals for the point is given, though Fournier printed a reference scale of 144 points over two inches; however, it was too rough to accurately measure a single point^{[11] (Wikipedia article on Typographic Unit).}