Friedrich Adolf Richter was a German toy manufacturer and pharmaceutical manufacturer and founder of the Anker factory in Rudolstadt, Germany. He was born 1846 in Herford, Westphalia and died 1910 in Rudolstadt. The Anker factory produced the popular Anchor Stone Blocks from the 19th century up to 1963.

Scale A logarithmic scale used to measure the magnitude of earthquakes. Each step on the scale is ten times greater than the previous one. seismic