Marble (toy) Martin Frederick Christensen—also of Akron, Ohio—made the first machine-made glass marbles on his patented machine. His company, The M. F. Christensen & Son Co., manufactured millions of toy and industrial glass marbles until they ceased operations in 1917. The next US company to enter the glass marble market was Akro Agate. This company was started by Akronites in 1911, but located in Clarksburg, West Virginia. Today, there are only two American-based toy marble manufacturers: Jabo Vitro in Reno, Ohio, and Marble King, in Paden City, West Virginia. In Australia, games were played with marbles of different sizes. The smallest and
Elgin Marbles that can injure the surface of the marble. Yet another effort to clean the marbles occurred in 1937–38. This time the incentive was provided by the construction of a new Gallery to house the collection. The Pentelic marble mined from Mount Pentelicus north of Athens, from which the sculptures are made, naturally acquires a tan colour similar to honey when exposed to air; this colouring is often known as the marble's "patina" but Lord Duveen, who financed the whole undertaking, acting under the misconception that the marbles were originally white probably arranged for the team of masons working in the