New Haven, Connecticut: Bradley Laboratories, Inc. 1954. First Edition. Irregularly paginated. Stiff paper wrappers, with metal comb style binding. Old owner's name scribbled out on title page, another name inside front cover. Third previous owner name stamped on title page. Otherwise clean internally. Near Fine. Comb. 
A manufacturer's catalog with sections including selenium, Copper-oxide, applications, and photocells. A scarce catalog in the marketplace.