Ringer's c. 1920s Optical Illusion Cigarette Cards, Complete Set of 25 psychology I have a hard time

I have a hard time wrapping my head around the process of so finely wrapping a bottle in woven basketry

but it's pretty great just sitting on the table

Snake charmers

The backs read: "Importe D'Autriche" (imported from Austria) "VB Lyon" and "Dessin-Depose en France" (designed in France)

Ringer's c. 1920s Optical Illusion Cigarette Cards, Complete Set of 25 psychology I have a hard timeSince finding a set of these c. 1920s British "Optical Illusion" cigarette cards several months ago, I've been actively looking for more I think the colors and graphics are fantastic, and what's more fun than optical illusions? On the back of each card is an explanation of each, or in some cases instructions for how to create an illusion according to the diagram on the face of the card, which admittedly in a few cases seems a fairly cumbersome