How the gas mantle made lamps 10X brighter
30:48
Pressure lamps: gaslighting on the go
24:56
There are two types of smoke alarm. One of 'em ain't so good.
22:23
The Most Important Material Ever Made
31:46
Why do hurricane lanterns look like that?
25:21
Old car headlights were all the same — which was a fairly bright idea
13:26
Have You Seen This Camera?
17:24
The touch lamp; a neat idea, and older than you'd think!
23:21