Also krato-. [mod. f. Gr. κράτος power + μέτρον measure.
The stem of the Gr. word is κράτε-, and the proper formation would be crateometer. Cratometer ought to mean ‘head-measurer.’] (See quots.)
1876. Catal. Sci. Appar. S. Kens., 504. Kratometer for finding magnifying power, and focal length of objectives. Dr. Royston Pigott, F.R.S.
1880. P. Greg, Across Zodiac, I. ii. 47. I inspected the cratometer, which indicated a force as great as that with which I had started.
Hence Crato-, kratometric a., pertaining to the measurement of power.
1836. Emerson, Eng. Traits, Land, Wks. (Bohn), II. 18. I have seen a kratometric chart designed to show that the city of Philadelphia was in the same thermic belt … as the cities of Athens, Rome, and London.
