When it opened in 1825, the Crescent Aqueduct was the longest aqueduct in the original system at 1,118 feet. The wall map shows a heavy concentration of homes, businesses, and schools near the Mohawk and Hudson rivers along the canal.
"Everything was really linked so much to the canal," Winters said. "Where the Hudson and Mohawk meet and everything comes together was very important to the history of the towns at the time, and there was a great deal of traffic down through that area."
"You can see all of the activity that surrounds the canal. There's a lot of population and businesses in the area," Bolen added.
Although the town has changed dramatically in the last 140 years, Winters said some remnants from the past still remain.
"I see the big changes from the small hamlets that were the focus of activity to now a much broader focus," she said. "[But] tons of family names have given their names to the different streets."
The county atlas is available for reference in the library's history room. The book cost $12.95 in 1866, which is equal to about $164 today, according to the U.S Government Printing Office.
According to the book, Clifton Park had a population of 2,712 in 1865 and Halfmoon's population at the time was 3,032. The two towns' populations of cows was 1,227 and 325, respectively. Population figures on swine, sheep, and horses were also available.