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 "the Greeks were guilty of excessive cleaning of the marbles before they were brought to Britain." During the international symposium on the cleaning of the marbles, organised by the British Museum in 1999, curator Ian Jenkins, deputy keeper of Greek and Roman antiquities, remarked that "The British Museum is not infallible, it is not the Pope. Its history has been a series of good intentions marred by the occasional cock-up, and the 1930s cleaning was such a cock-up". Nonetheless, he claimed that the prime cause for the damage inflicted upon the marbles was the 2000-year-long weathering on the Acropolis.