ter-hour, but the minute could not be accurately counted until the pendulum clock
[1657], and the second had to await the invention of the 39.1-inch pendulum in 1670.”
On divisions below the level of the hour, see Holford-Strevens 2005, 7 – 10.
- Nicolet 1991; Wallace-Hadrill 1997.
- Grafton 2003, 82.
- Wilcox 1987, 189 – 90; B. Anderson 1991, 69 – 70.
notes to page 215. 301