The Hingeless Parabolic Arch III. Effect of Rib-Shortening

THE Paris Metropolitan Railway line No. 5, " Gare du Nord-Etoile " crosses the River Seine, not far from the " Jardin des Plantes," over a structural steel bridge 140 metres in span, called the Austerlitz Bridge (Figure 1 ). M Fauconnier

Early Brickwork Building in masonry of natural stone or brick-work is an ancient craft with a tradition descending through at least six thousand years. Its technique was perfected long before the age of building science, and its methods have been the last to undergo helpful scientific criticism. S.B. Hamilton

THIS paper is a record of the writer’s observations made in Barcelona and a comparison of them with his opinions regarding Britain’s position in the event of our being exposed to attacks by hostile aircraft. Cyril Helsby