This is an excerpt of a letter from Gauss to Bessel, used with kind permission of the
Niedersächsische Staats- und Universitätsbibliothek Göttingen.
The original letter has been photocopied,
and the copy has been scanned in at 300dpi using a grey level scanner.
The data are stored in TIFF format.
The challenge is to reconstruct the original writing from the available data.
For more information, see the
story of this letter.