Coal breaker the United States in the state of Pennsylvania (where, between 1800 and the mid-20th century, many of the world's known anthracite reserves were located). At least one source claims that, in 1873, coal breaking plants were found only at anthracite mines in Pennsylvania. The first function of a coal breaker is to break coal into pieces and sort these pieces into categories of nearly uniform size, a process known as breaking. The second function of a coal breaker is to remove impurities (such as slate or rock), and then grade the coal on the basis of the percent of impurities
World Figure Skating Championships cumulative medal count World Figure Skating Championships cumulative medal count The following is the "cumulative medal count" for countries at the World Figure Skating Championships. It includes countries that no longer exist. Boldface denotes active skaters and highest medal count among all skaters (including these who not included in these tables) per type. Boldface denotes active skaters and highest medal count among all skaters (including these who not included in these tables) per type. Boldface denotes active skaters and highest medal count among all pairs or separate partners (including these who not included in these tables) per type. Italic denotes statistics of performances