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
Liquid marbles at the solid-air interface, the interfacial liquid marbles are constructed on the hexane/water interface using water droplets with a surface coating composed of nanoscale materials with special wettability (Figure 2). To realize interfacial water marbles at hexane/water interface, the individual particle size of the surface coating layer should be as small as possible, so that the contact line between the particles and the water reservoir can be minimized; special wettability with mixed hydrophobicity and hydrophilicity is also preferred for the interfacial water marble formation. The interfacial water marble can be fabricated by firstly coating a water droplet with nanomaterials with