I built a natural draft furnace to test ideas about how hot a furnace could get without the use of bellows. Natural draft is the flow of air through a furnace due to rising hot air. The hot gasses in the... continue reading

posted by Mordhaus 7 years 4 months 2 weeks ago • 454 views • 5:46

YouTube description: Brady and Keith investigate the true pioneers of the incandescent light bulb. Films by James Hennessy and Brady Haran Royal Society website: http://bit.ly/Royal_Society ... continue reading

posted by Aard Vark (oritteropo) 8 years 8 months 3 weeks ago • 181 views • 5:33

Various ways of turning electricity into light.

posted by wormwood 1 decade 1 year 3 weeks ago • 300 views • 2:58