Intended for young men with limited formal education, this manual was the final project of the landscape gardener John Claudius Loudon (1783-1843). Completed by friends, the book appeared posthumously in 1845. The son of a farmer, Loudon was well aware that men who began their careers as gardeners often became the stewards of estates, bailiffs, or tenant farmers later in life, and he provides here some of the mathematical and technical instruction necessary to carry out those roles successfully. Including sections on fractions, geometry, trigonometry, architectural drawing, and the calculation of wages and interest rates, the book traces a remarkable picture for the modern reader of the administrative duties expected of horticultural and agricultural workers in the mid-nineteenth century. Also included are conversion tables, a biography of Loudon, and a short preface by his wife Jane, whose Instructions in Gardening for Ladies (1840) is also reissued in this series.