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Francesco Algarotti, Dialoghi sopra la luce, i colori e l'attrazione . . . (1750) - Title page detail

This printer’s mark shows three putti holding a harp and a compass, combining the measure and tone of music with the precision of mathematics. Algarotti’s famous work is on Newton’s theory of light and colors.


To view the catalog entry for this book, please visit the Othmer Library’s online public catalog at : .


Photograph by Douglas A. Lockard.


From The Roy G. Neville Historical Chemical Library, Othmer Library of Chemical History, Chemical Heritage Foundation, Philadelphia, PA.


CHF is a nonprofit library, museum, and center for scholars dedicated to the history of chemistry. For more information, visit

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Taken on May 22, 2009