Beecham's help to scholars : containing arithmetical tables and signs, weights and measures, tables of the metric system, geographical & drawing definitions, and other useful information arranged progressively / Thos. Beecham.

Licence: Public Domain Mark

Credit: Beecham's help to scholars : containing arithmetical tables and signs, weights and measures, tables of the metric system, geographical & drawing definitions, and other useful information arranged progressively / Thos. Beecham. Source: Wellcome Collection.