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Due to environmental problems (air conditioner turning on and off with vent blowing on this apparatus), results from this experiment are compromised. Here is a revised, improved version: A qualitative demonstration of universal gravitation using a torsion balance. Unfortunately, this setup had too much uncertainty to be able to observe the desired changes. It also takes a really long time for any movement at all, so the observations one makes before seeing the high-speed video are tricky. In the summer of 2018, I'll be building a large-scale apparatus in my home (where I can better control environmental conditions) which should allow me to make measurements precise enough to determine the value of the gravitational constant. Be sure to subscribe and click the notifications bell so you'll receive alerts as I progress through the build and testing of the new device. See the first video in that series at
