1965 - James Gunn[?] and Bruce Peterson[?] use observations of the relatively low absorption of the blue component of the Lyman-alpha line[?] from 3C9[?] to strongly constrain the density and ionization state of the intergalactic medium
... Steam Museum[?]
East Anglia Railway Museum[?]
Strumpshaw Hall Steam Museum[?]
Toad Hole Museum[?], How Hill
Working Textile Museum[?], Derwent Valley ...