Digitization and Digits

Initially, I was going to post only the epitaph of the young Benjamin Franklin. It is rather clever, from a bibliographical as well as a theological point of view:

The Body of B. Franklin, Printer; like the Cover of an old Book, Its Contents torn out, And stript of its Lettering and Gilding, Lies here, Food for Worms. But the Work shall not be wholly lost; For it will, as he believ'd, appear once more, In a new & more perfect Edition, Corrected and amended By the Author.

(The image and transcription are available from the Library of Congress, “Benjamin Franklin … In His Own Words,” http://www.loc.gov/exhibits/treasures/franklin-epitaph.html.)

Then I went to look something up in Franklin’s Autobiography in Google Book Search, and I discovered an unexpected set of digits:

(The Work not wholly lost here, although it is not in a new & more perfect Edition, is from the Harvard Classics edition of 1909.)