Ancient and modern engineering and the Isthmian canal
CHAPTER XII.
124. The Masonry Arch 154 125. Old and New Theories of the Arch 155 126. Stress Conditions in the Arch-ring 158 127. Applications to an Actual Arch 158 128. Intensities of Pressure in the Arch-ring 162 129. Permissible Working Pressures 163 130. Largest Arch Spans 163