The "Nancy method of induction."  From Human Magnetism, or, How to Hypnotise by James Coates, 1904.

From Artistes et Bourgeois/ Vingt-Quatre Compositions by Henri Gustave Jossot, 1894.

Note the glowing-eyed entities looming in the very back.  So often what begins as innocent fun takes a demonic turn.  This cursed image is from MacMurray's 1961 yearbook.

Though Wikipedia traces the lightbulb joke to the late 1960s, we can do so much better (folks expect that of us, and as you've seen time and again, we strive to deliver).  This one's from the 1940s, and not only does it show how many it takes to screw in a lightbulb, it names names as well as explains just why it takes so many (spoiler: they're not electrical engineers).  From Michigan State's 1947 yearbook.

INSTRUCTIONS: Click to reveal a second moment. From Washington College's 1976 yearbook.

They believe they're a newlywed couple, after hypnosis ... or perhaps even before hypnosis.  From Practical Lessons in Hypnotism by William Wesley Cook, 1901.

Not everyone knows that old cries of ghosts may be found at Used Boo Stores.  From Snead State Junior College's 1971 yearbook.

"'There's the moon,' said Harkness."  An illustration by Harold Matthews Brett for Harper's (1906).

From Butler's 1979 yearbook.

Hypnotized soldiers drank water they were told was whisky, got drunk, then slept with each other.  Make love, not war!  From Mechanix Illustrated, May 1945.

From Le Charivari, 1889.

Just some very happy university presidents of old.  May your own day be this happy.

From Lees-McRae's 1947 yearbook.

From American University's 1969 yearbook.

From Millikin's 1950 yearbook.

From Salem's 1952 yearbook.

Mop wigs adorned with what we presume are sprigs of mistletoe to invite kisses.  From Western Michigan's 1965 yearbook.

It's been said that a good portrait photographer brings out the inner person.  From Millikin's 1954 yearbook.

“You resist / strangers until a stranger makes the old hungers / brutally wake.” —Frank Bidart, "Like," Half-Light: Collected Poems 1965–2016 

Photo from Swarthmore's 1974 yearbook.

Reblog if you take the light with you.  From Guilford's 1960 yearbook.

INSTRUCTIONS: Click to reveal the other half of the headline. From Elmhurst's 1940 yearbook.

INSTRUCTIONS: Click to "Say Cheese." From Concordia's 1977 yearbook.