Public domain
Two physical instruments
From the collection of Rijksmuseum, Amsterdam. Free to download, adapt and use — no permission needed.
About this work
Above a model of a pointer telegraph, below a self-acting current breaker.
Rijksmuseum, Amsterdam’s own descriptionSubjects
Credit lineTwee natuurkundige instrumenten. c. 1857 - in or before 18. Fredrich Wilhelm Funckler. Rijksmuseum, Amsterdam. Public domain.