In the end, though, it usually comes down to an irresistible urge to combine a love of feet with a love of horsepower, says Block.
In the race to the future, horsepower was losing to gas power, and the city was changing.
They used a 30 horsepower refrigeration unit to keep the wall frozen and spent about $15 a day to power it.
Note: The horsepower is used to measure the power of engines.
Note: This term was coined by James Watt, who invented a new type of steam engine in the eighteenth century. Watt found that the horse could do a certain amount of work per second; when he sold his steam engines, this measurement allowed him to estimate the worth of an engine in terms of the number of horses it would replace. Therefore, a six-horsepower engine was capable of replacing six horses.