It took about 20 minutes and two helium tanks to fill up the huge latex balloon. A rope dangling from the bottom held onto an assortment of gadgets, including a video camera, parachute, and a razor attached to motor that was programmed to cut the rope at just the right altitude.

  This time on The Engineer's Corner, I want to look back three weeks ago, and look back over fifty years ago.  And how little typos can have a big impact when it comes to engineering.