Second edition. xii, 150pp, with two fold-out charts and occasional illustrations, tables etc in text. Stapled booklet in printed paper wrappers. 12mo. Covers are generally worn and tanned, rubbed at edges, and lightly chipped on corners and spine ends. Staples oxidizing, some spotting on endpapers, else internally neat, clean and tight.
An early polemic on the merits of the metric system of measurement, almost a hundred years before the UK adopted the system.
