Note 312 — CHAPTER 14 THE RISE OF COMMERCIAL ARCHITECTURE IN ENGLAND AND AMERICA
Reading edition
One must say ‘metal’, because structural steel was only gradually replacing cast and wrought iron at this time; all these types of ferrous material were probably used in the Home Insurance, the Rookery, and other skyscrapers of the mid eighties. Two books by W. Birkmire, Architectural Iron and Steel, New York, 1891, and Skeleton Construction in Buildings, New York, 1893, best present the technical aspects of large-scale metal construction as it matured in the eighties and early nineties.