randform

The above scientific visualization (which displays the wave pattern of a little droplet dropped into mercury in one focus of the ellipse) can be found in a book by Wilhelm Weber and his brothers Ernst Heinrich Weber. It can be found in principle on p.582 in the html version or on p. 619 of the pdf version at a google books scan of the book: “Wellenlehre auf Experimente gegründet, oder, über die Wellen tropfbarer Flüssigkeiten mit Anwendungen auf die Schall und Lichtwellen” (The theory of waves based on experiments or about waves of drippable liquids with applications to sound and lightwaves). The book is from 1825. Unfortunately the google scan has not such a nice quality as e.g. a scan of galileos works mentioned in this randform post. In particular in the google scan one can’t read that the drawing was made by:

Is Fr. Ed. Mueller the secret pioneer of Op Art?