With the "Catalog" opened flat, the reader might find the large page on the left full of text and intriguing illustrations from a volume of Joseph Needham's "Science and Civilization in China", showing and explaining an astronomical clock tower or a chain-pump windmill, while on the right-hand page are a review of a beginners' guide to modern technology ("The Way Things Work") and a review of "The Engineers' Illustrated Thesaurus".