intact single heavily ornamented double-sided richly colored chicago city street car early american pattern glass amber panel likely removed from a hinged transom window containing wood muntins. the square-shaped pressed ornamental glass panel was designed and fabricated around the late 19th or early 20th century by the mosaic glass company addison glass company, fostoria, oh., addison, ny. the cubed and diagonal flower pattern panel was one of many commonly used in houses, commercial buildings, streetcars, taverns, railroad passenger cars, etc. the additional image shows similar pressed glass panels (by the same manufacturer) used on an early chicago streetcar. based on recollections of fred sutcliff, the addison glass company was originally founded as mosaic glass company and was located in fostoria, ohio. the factory buildings were torn down and moved to addison, ny around 1892-1893. most of the products produced were pressed window tiles in various sizes and colors. preserve jars and lantern globes were also manufactured there. sutcliff discounts the rumors of cut glass ever being made there. he described the addison factory as being built of timber with galvanized roofing and brick flooring, with two chimneys. the factory was equipped with one large fire pot and lehrs for cooling the glass. ten dollar gold pieces were sometimes thrown into the pot in order to tint the glass red. sandstone used as a raw material was found locally in addison. the factory eventually went bankrupt and was torn down in 1909.