Billiard table ivory balls from warping. The first use of electric heating was for an 18.2 balkline tournament held in December 1927 between Welker Cochran and Jacob Schaefer, Jr. The New York Times announced it with fanfare: "For the first time in the history of world's championship balkline billiards a heated table will be used..." A pool table, or pocket billiards table, has six – one at each corner of the table () and one at the midpoint of each of the longer sides ( or ). Pool tables come in different sizes, typically referred to as , , , or tables.
World Pool-Billiard Association a country's national federation. The chart and table shows the WPA's members : , the WPA board of directors are: World Pool-Billiard Association The World Pool-Billiard Association (WPA) is the international governing body for pool (pocket billiards). It was formed in 1987, and was initially headed by a provisional board of directors consisting of representatives from Japan, the United States, Sweden, and Germany. , the WPA president is Ian Anderson of Australia, and the organization is headquartered in Sydney. It is an associate of the World Confederation of Billiards Sports (WCBS), the international umbrella organization that encompasses the major cue