Take a close look at the details of the artist’s rendering of Lower Manhattan in 1870.  Click to magnify, and you see granular detail.  Note the details of the human-built structures and technologies and what they reveal about the wealth of the leading city in the U.S. at that time.  Contrast it with a similar drawing done in 1915.  What does the contrast between the two images reveal about the changes in wealth and technological development in only a forty-five-year period?  Write 250-300 words