piers built into brickwork , each having a bearing surface of 10 square feet , including the casing , or 200 feet in all . The form of the roof was the original idea of Mr . — afterwards Sir — Anthony Panizzi , then principal librarian of the British Museum ; the details being worked out by the… … being coupled together by an adjusting nut , 1 foot in length , to regulate the length of the rod . At the heel of the principal , the top and bottom members of the ribs meet , and are formed into one piece by means of a cover plate stiffened with angle irons . The central curb is also elliptical ,…
