A treatise of such mathematical instruments as are usually put into a portable case, containing their various uses. In arithmetic, geometry, trigonometry, architecture, surveying, gunnery, etc., with a short account of the authors who have treated on the proportional compasses and sector. To which is now added an appendix containing the description and use of the gunner's callipers / [J. Robertson].

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A treatise of such mathematical instruments as are usually put into a portable case, containing their various uses. In arithmetic, geometry, trigonometry, architecture, surveying, gunnery, etc., with a short account of the authors who have treated on the proportional compasses and sector. To which is now added an appendix containing the description and use of the gunner's callipers / [J. Robertson]. Public Domain Mark. Source: Wellcome Collection.