Lightning arresters at the Companhia Campineira de Tracção, Luz e Força ("The Campineira Company of Traction, Light and Power") Salto Grande ("Big Waterfall") power house. Original photo from a 1922 issue of Revista da Semana; this copy is courtesy of Ralph Menucci Giesbrecht, from Santana do Parnaíba SP.
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© Antonio Augusto Gorni