Public domain
Hydraulic excavating machine
From the collection of Rijksmuseum, Amsterdam. Free to download, adapt and use — no permission needed.
About this work
Photograph on cardboard of a hydraulic engineering machine (excavator). Inscription: 'Ralph R. Osgood, patentee & builder Troy N.Y. Patents (4th May 1875, 13 July, 23 Oct. 1877).
Rijksmuseum, Amsterdam’s own descriptionSubjects
Credit lineWaterbouwkundig graafwerktuig. 1875 - 1900. anonymous. Rijksmuseum, Amsterdam. Public domain.