A piece of ground was recently sold in Phlladelplila, wilh a ftontsge of tí feet on Chestnnt and 34 feeton Fourth Street, for 185,000, or $156 per square foot. It was necessary to complete a building site in the heart of the city, and, thersfore, eoiumanded tliis exlraorüinary fiírure. Tliis 9 the highest price ever paid for real estáte iu Americu. The one nezt to t, perhspt, waa on Wall street, New York city, wliere ii lol ioM for $145 per square foot. The PhiUdelpliia piice was at the Bate of ü,800,000 per acie. Who knows but Aun Arbor renl estáte may be solü for $ 150 per squme foot ir the ri;lit coursi; is taken iu boomiiig the town ?