The idea is that it would ‘read’ the bumps on your head by the use of mechanical plungers and it would then print a profile of your ‘character’ in a matter of seconds.
There’s a remarkable amount of information about this device on the web (and yes, “psycograph” is the correct spelling) including a fantastic page of original advertising.
You can download the relevant podcast as an mp3 and the others are also well worth checking out.
They are written and presented by mind and brain historian Christopher Green, who you may know from the Classics in the History of Psychology website, or his involvement with Advances in the History of Psychology blog.
Don’t be put off by the headache-inducing website, unlike many other special podcasts, is very well produced with high quality audio and an impressive line-up of researchers.
Link to This Week in the History of Psychology podcasts.