Originally published in 1915, 'the aim of the present book is to present the elementary principles of mechanics in accurate though clear terms and to show the application of those principles to the simpler problems arising in engineering and architectural applications'. Notably, 'the general treatment is based more upon graphical conceptions than upon purely mathematical analysis because experience shows that the mind of the engineering student reasons more clearly from diagrams than from symbols'. A number of experiments are presented, principally those which require the simplest form of apparatus, with answers to exercises supplied at the back. Chapters are broad in scope, detailed and clearly written; chapter titles include, 'Forces and other vector quantities', 'Machines and efficiency' and 'Centre of gravity and centroid'. This vibrant and thorough textbook will be of great value to scholars of physics as well as to anyone with an interest in the history of education.

Many of the modern methods of structural analysis based on concepts of virtual work and energy were developed and popularised in Italy in the latter half of the nineteenth century. Building on the work of Luigi Menabrea, the mathematician Carlo Alberto Castigliano (1847-84) provided the first full proof of these methods in his 1873 dissertation while based in Turin. Equally important was his popularisation of the theory in his Theorie de l'equilibre des systemes elastiques et ses applications (1879), in which he applied his theory to a wide range of important real-world cases. The work is here reissued in its 1919 English translation, by the consulting engineer and lecturer Ewart S. Andrews. Castigliano covers the basic theory of elastic stresses, introducing useful approximations; he then moves on to the analysis of real structures, including roof trusses, arches and bridges in both iron and masonry.

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