Why does president sign with so many pens?

Just because really. It's kind of like giving an autograph. He gives a pen as a thank you to the people that created the bill usually. They are significant pieces of history.

1.world in spatial terms2.places and regions 3.human systems4.physical systems5.geography and it's uses6.environment and society

Early 18th century british industries were generally small scale and relatively unsophisticated. most textile production, for example, was centred on small workshops or in the homes of spinners, weavers and dyers: a literal ‘cottage industry’ that involved thousands of individual manufacturers. such small-scale production was also a feature of most other industries, with different regions specialising in different products: metal production in the midlands, for example, and coal mining in the north-east.two illustrations of 18t