In 1814 Fraunhofer made a spectrum in the same way, but happened to look at it with a telescope.
Consequently they are known as Fraunhofer lines, or dark absorption lines.
Fraunhofer had previously made known that the spectrum of ignited gases is discontinuous.
He also invented a heliometer, afterwards perfected by Fraunhofer.
His experiments were repeated by Morgan, Wollaston, and—with far superior precision and diligence—by Fraunhofer.
Efforts at improving optical glass had, however, not been confined to the descendants and successors of Guinand and Fraunhofer.
Yet at that time the fifteen-inch achromatic of Pulkowa had already left the workshop of Fraunhofer's successors at Munich.
The lower-case letters designating certain Fraunhofer lines: a, b, g, h.
Abolish the solar nucleus, and we should have a spectrum showing a bright line in the place of every dark line of Fraunhofer.
In 1814, Fraunhofer observed these lines in detail, mapped them, and proved that they identified elements long known to chemists.