16293 SNN -C12 PREFACE. THE following pages contain a discus sion of the theory affecting the stability and strength of stone or brick arches, including bridges, culvert and tunnel arches, groined and cloistered arches, together with various styles of domes. In the former treatise by the author, on Voussoir Arches, the theory of Dr. Scheffler (given in his German treatise on arches) for incompressible voussoirs was given, and applied to the experiments on arches, also to the case of a segmental stone bridge, the compressibility of the material being included in an empirical manner, which seemed to be justified in part from the consideration of the numerous experiments given. In the present treatise the aim has been to make an advance in the theory, by considering the effect of the compressi |