The image is a photograph of a plaque attached to a metal pole. The plaque is rectangular in shape and has a beige background with black text. The text on the plaque reads "THE BLACKSTONE ENGINE" in bold letters. Below the text, there is a description of the engine, which was purchased in 1922 and was installed in the Adelaide Chemical Company. The engine was purchased and brought to the Hausler's Cordoba Property near Morgan Creek and was used to pump water from the Museum of the Cordoba Orangery near Morgan. 

The plaque is mounted on a green metal frame and is attached to the pole with screws. The background is blurred, but it appears to be an outdoor setting with trees and greenery visible.