240 Dial: "Daily Mail Radio At-a-Glance: nine important facts given in relation to each of 76 British and continental stations with openings for own dial readings"
Works photographic negative of double wire armouring machine, WT Glover & Co. Ltd works, Trafford Park
650 Technical drawing: "Activated Sludge" process plant 1923 - Type "C" for treatment of sewage from small communities
Copies of Wireless Magazine and company brochures for Bertram Thomas. Copies of Wireless Magazine and company brochures for Bertram Thomas.
210 The working of an automatic telephone with special reference to the exhibit in the Science Museum