Whale oil was used in automobile transmissions as late as 1973.
56
Any modern jet is capable of breaking the sound barrier.
34
The electric chair was invented by a dentist!
122
Jumbo jets use 4,000 gallons of fuel to take off.
19
In the early 1960's, Porsche commercially manufactured farm tractors.
24
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41