Now, there are some folks that will tell you the only way to get to the second I2C bus is to access the camera S5 header (or the S2 header). That would involve some incredible soldering work, or a socket. I don't have the socket, and my hands aren't good enough to solder at that pitch.
However, I can solder that P5 header. The unfortunate thing is that the P5 header is really close to the GPIO header. Using the P5 header while using Lady Ada's Pi Cobbler header may be problematic. I took some long headers and soldered them in place, at a slight angle.
Once you get that done, you need to run some code. I'll post the Python 3.x code in a bit. Here's a link to the original code. All that needs to be done for the Python 3.x code is to change the print statements to print() functions. Here's the link to the RaspberryPi.org forums, where bgreat posted the code:
In hindsight, I should have looked at putting a 2x4 socket there. I'm just not sure that I have any.