Large glass marble found above the front door of 607 Grove Street, in the ceiling of the open porch. The marble is clear glass with bands of colors on the inside. The middle is a solid striped core of white, pink, blue, and green. There are four groups of three yellow wavy strands of glass, just below the surface of the marble. The glass has small bubbles just below the surface. This type of swirl marble was produced in Germany and Austria and was imported into the United States in huge quantities in the 1800s and early 1900s. These marbles were available in drug stores, through mailorder catalogs, in department stores, hardware stores, and variety stores. This style of marble is referred to as a "Solid Core Swirl."
Reference: Block, Stanley A., ed. Marble Mania. Atglen, PA: Schiffer Publishing, Ltd., 1998.