relation exists between them and their prod- ) | | | RIN i913 1914 J95 196 J19I7 1918 199 1920 192} 1922 1923 1924 Appalachian 24,946,000 28,225,000 27,049,000 Lima-Indiana . 10,032,000 2,404,000 2,288,000 Illinois and Kentucky have each a posi- tion of this density, and probably orthor- hombic in crystallisation, being ilentical with the rapidly developing statistical science, industry began to duplicate 3 FIG.