Ragged Dick plate — A plate from an early edition depicting a "smasher" (luggage boy), a newsboy, and two bootblacks
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=12686228

Ragged Dick cover —
Photo Credit: https://manybooks.net/titles/algerhoretext04rgddk10.html

Ragged Dick, serialized version — Ragged Dick, serialized in Student and Schoolmate and later expanded into a full-length novel
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=12648187

Alger on Harvard Commencement Day, July 1852 —
Photo Credit: By Whipple, John Adams - Public Domain, https://commons.wikimedia.org/w/index.php?curid=20407260

Horatio Alger Jr —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=541024

William Franklin —
Photo Credit: By Attributed to Mather Brown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=4635381

4th Edition of Experiments and Observations on Electricity — Exhibit in the Franklin Institute, Philadelphia, Pennsylvania, USA,, showing Franklin's bifocals on the 4th edition of his book.
Photo Credit: By Daderot - Self-photographed, Public Domain, https://commons.wikimedia.org/w/index.php?curid=17126777

Title page of Experiments and Observations on Electricity — Title page of 1751 original publication
Photo Credit: By E. Cave - printer - Public Domain, https://commons.wikimedia.org/w/index.php?curid=56312567

cover of Florae Parisiensis Prodromus — by Thomas-François Dalibard
Photo Credit: https://www.amazon.com/Parisiensis-Prodromus-Catalogue-Rapport%C3%A9es-D%C3%A9nominations/dp/0243512740

Thomas-François Dalibard —
Photo Credit: http://telescoop.tv/people/63056/thomas-francois-dalibard.html

Dalibard's lightning experiment, 1752 —
Photo Credit: