Bill Wetzel:
111 Street stop on the Number 7 line
Bill Wetzel:
To the Hall of Science
Bill Wetzel:
Wires on the outside of the 111 Street station
Bill Wetzel:
Getting close
Bill Wetzel:
Fabric crafts
Bill Wetzel:
Turbine car at the Popular Science booth
Bill Wetzel:
Pulse-jet-powered cycle
Bill Wetzel:
Burning propane
Bill Wetzel:
Do-nothing box
Bill Wetzel:
Music box
Bill Wetzel:
Puffs of fire
Bill Wetzel:
Gold Leaf Electroscope
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Kelvin Generator
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Pull the rope to make music
Bill Wetzel:
Lots of kids' activities
Bill Wetzel:
FIRST Lego competition
Bill Wetzel:
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Bill Wetzel:
Jet Ponies
Bill Wetzel:
Jet Ponies
Bill Wetzel:
Jet Ponies
Bill Wetzel:
Innovative bike cart
Bill Wetzel:
Swimming Cities project
Bill Wetzel:
The original Mouse Trap game
Bill Wetzel:
Part of mouse trap
Bill Wetzel:
Part of mouse trap
Bill Wetzel:
Part of mouse trap
Bill Wetzel:
Part of mouse trap
Bill Wetzel:
Pedal-power ferris wheel
Bill Wetzel:
Brooklyn Aerodrome delta wing
Bill Wetzel:
Mechanical sculpture
