Appletons' Popular Science Monthly, June 1899 Volume LV

"Appletons' Popular Science Monthly, June 1899" by Various is a late 19th-century scientific magazine that shares science to a wide audience. It focuses on helping people understand the natural world, plus it gives detailed reports that were relevant at the time. The opening article, written by G. Frederick Wright, talks about a new way to guess how old Niagara Falls is. It looks at past guesses from famous scientists and compares them to new measurements. These new measurements use geological surveys of the erosion of the falls to build a better timeline. This discussion is important because it helps us understand the region's geological history and challenges what people thought about the falls' real age.