File:Charles Greeley Abbot signature.png
English: Charles Greeley Abbot's signature (with an alpha channel) from a 1916 memorandum.
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Cropped from larger image, adjusted levels, adjusted colours, cleaned up compression artifacts and added alpha channel. The original can be viewed here: Abbotoct21916pg4x.jpg. Modifications made by AdamBMorgan.
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