1) The law of self interest - when people work for themselves and their own good
2) The law of competition - people make better products because of competition
3) The law of supply and demand - enough goods would be produced or supplied at the lowest price to meet the demand in a market
It is important to use standard weights and measures because everyone can understand what you are talking about when you use and form of measurement, be it pounds, kilograms, inches, or centimeters.
Mount Olympus in the Book you mentioned is located right above the Empire State Building in New York City.