How Much Horse Manure Was Deposited on the Streets of New York City Before the Advent of the Automobile, and What Happened to It?

 According to the 89th Annual Report of the Board of Health, nearly 500 tones of horse manure were collected from the streets of New York every day, produced by 62,208 horses living in 1,307 stables. The manure, along with human waste, was deposited on Barren Island, where it was converted into fertilizer in a process said to be "not inoffensive" to residents on the Long Island shore.

Creative: Tronvig Group