. . "Trignometry Early works to 1800." . . . . . . "The geometrician containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems ... By Benjamin Donn"@en . . . "The geometrician : containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems ... By Benjamin Donn"@en . . "Early works"@en . "Early works" . "Questions and answers" . "Questions and answers"@en . . "Essay on the elements of plane trigonometry"@en . . "Essay on the elements of plane geometry"@en . . "The geometrician: containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems"@en . "The geometrician : containing essays on plane geometry, and trigonometry : with their application to the solution of a variety of problems"@en . . . . . "Essay on the nature, investigation and application of logarithms"@en . . . . "The geometrician" . "Electronic books"@en . . . "The geometrician containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems, which are of great Use in measuring Heights and Distances of Places, surveying of Counties, Sea-Coasts, &c. By Benjamin Donn, Teacher of the Mathematics, and Lecturer in experimental Philosophy, Author of the Essays on Arithmetic, Book-Keeping, the British Mariner's Assistant, &c"@en . "The geometrician containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems, which are of great Use in measuring Heights and Distances of Places, surveying of Counties, Sea-Coasts, &c. By Benjamin Donn, Teacher of the Mathematics, and Lecturer in experimental Philosophy, Author of the Essays on Arithmetic, Book-Keeping, the British Mariner's Assistant, &c" . "The geometrician containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems"@en . . "The geometrician containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems, ... By Benjamin Donn" . "The geometrician: containing essays on plane geometry, and trigonometry"@en . . . "The geometrician : containing essays on plane geometry, and trigonometry: with their application to the solutions of a variety of problems, ... By Benjamin Donn" . . .