Sprengel Vacuum Pump: The most efficient vacuum pump ever?
18:41
The Chlorine Machine
16:43
Building A Mercury Still
16:36
Giant glass diffusion pump and cathode ray tube demo
20:40
Making TNT
33:00
Sodium Water Hybrid Rocket?
21:58
Rotary Pump with a Transparent Window. Watch how it Pumps the Liquid
17:57
Gearless Magnet Bike
12:05