"Pedal Power" Featured in Sierra Magazine

The March issue of Sierra Magazine has several interesting articles
about bicycling.

http://www.sierraclub.org/sierra/

"THE BICYCLE IS A MASTERPIECE of physics. It harnesses human muscle
power directly to that old-time marvel--the wheel--and yields a
vehicle more energy efficient than any other devised, ever, by anyone.
A human on a bicycle is more efficient (in calories expended per pound
and per mile) than a train, truck, airplane, boat, automobile,
motorcycle, skateboard, canoe, or jet pack. Cycling is more efficient
than walking, which takes three times as many calories per mile. Pound
for pound, a person riding a bike can go farther on a calorie of food
than a gazelle can running, a salmon swimming, or an eagle flying."


There's also a description of a futuristic traffic structure created
for LA cyclists in 1900.

http://www.sierraclub.org/sierra/200803/bikeway.asp

Art Harris