3 MARCH 1967, Page 28

Cement history

SIR: I am writing a book about the early history of the cement industry. If any readers have un- published information relating to cement manu- facture during the nineteenth century which they would allow me to make use of, I should be very grateful if they would get in touch with me. A. I. Francis 23 Roxborough Park, Harrow-on-the-Hill, Middlesex