Note 59 — Chapter XXIV · THE CONFLICT OF THE IMPERIAL AND METRIC SYSTEMS
Reading edition
For instance, in The Coming of the Kilogram (H. O. Arnold-Forster) the problem ‘How many times is 1 grain contained in 1 ton?’ is worked out in a half-page of figures. It can be done in 15 seconds, almost mentally. A cwt. is 112 lb.; a ton is 2240 lb.; multiply by 7000. Answer: 15,680,000 grains (or times).