Have a look at https://plus.google.com/+ThadStarner/posts/HQfRCMALr2V https://plus.google.com/+ThadStarner/posts/HQfRCMALr2V , especially the comments. "Upton['

Have a look at https://plus.google.com/+ThadStarner/posts/HQfRCMALr2V https://plus.google.com/+ThadStarner/posts/HQfRCMALr2V , especially the comments. "Upton['s] '67 hack" is evidently http://www.media.mit.edu/wearables/lizzy/timeline.html#1967b http://www.media.mit.edu/wearables/lizzy/timeline.html#1967b .