Horseshoe Falls, from Canada Side

Each inexpensive stereocard features two, almost identical photographic prints mounted side by side. When viewed through a special device, the pictures blend, creating the illusion of three-dimensionality and depth. Charles Bierstadt opened a commercial photography studio in Niagara Falls in response to the high demand for images of this magnificent site. Works by his artistic brothers—the painter Albert and fellow photographer Edward—can be seen nearby.

91.99.14