over the last year (2010-2011) the population has changed at a rate of 2.9%. it is also known as no-penetration boundary condition. derby replied with a sarcastic pun on swell, meaning dandy as well as a form of wave. he associated red with the "beautiful", orange with the "noble", yellow to the "good", green to the "useful", blue to the "common", and violet to the "unnecessary". it was created in early 21st century. the sale of his art collected came when his company experienced a rapid collapse. the body was the first discovery wolf made with his new instrument. 