Experiments of F. Runge

I discovered caffeine. It's true. I also discovered paper chromatography. But that's another story.
The way that I discovered caffeine was, after my good buddy Johann Wolfgang von Goethe encouraged me to analyze coffee, I did. It was a very grueling process, one that lasted several months. I had to look at coffee under a microscope, and do lots of analytical chemistry. Unfortunately, the Internet doesn't really expound on what went down, and I can't really remember what I did, so that's about as much as I can share with you...sorry.