#OnThisDay 1949: Cornish tin mines were having a resurgence - clearly the lucky broom was working.
#OnThisDay 1970: John Noakes experimented with the latest TV tech. He has the (chroma) key to our heart.
#OnThisDay 1972: Esther Rantzen put her shoplifting skills to the test to check out some anti-theft technology.
#OnThisDay 1967: There are some lovely shots in this Tomorrow’s World piece on the future of lighthouse engineering.