Well, mystery solved: It's called an RSSfeed button and it's used to help you keep track of blogs. If you don't know what a blog is, don't worry, i have you covered on that one too: This is a blog!
Ok, back to the RSS button. Clicking on this little button will take you to a page that lets you "subscribe" to whatever blog you are currently reading. If you click on the RSS button on this page, every time we post a new story about making stills, distilling whiskey, etc... the article will automatically be sent to a database and stored in your "feed account," to be read at your convenience. It's a nifty little way to keep tabs on your favorite sites without hunting all over the web for your favorite pages every few days.
If you want to subscribe to the stillhouse rambler, go ahead and click on the button. It's free!