Harpers Ferry rainbow moiré.
From p. 266 of The Life and Times of Frederick Douglass: From 1817-1882, by Frederick Douglass, ed. by John Lobb (1882). Does not include metadata indicating library of origination or date of digitization (but does include Stanford library artifacts).
Unknown; colored endpapers?
From the front matter of The Odyssey, v. 1, by Homerus, trans. Alexander Pope, ed. Gilbert Wakefield (1796). [Here]
Black and white printed plates digitized in color, with neon effect.
From various pages of Moses and Geology: or, The Harmony of the Bible with Science, by Samuel Kinns (1883). [Here]