History of anthracite coal mining in Pennsylvania competition with the Schuylkill Navigation Company, until the Reading Railroad eventually leased out the Schuylkill Navigation Company in 1870. The Delaware, Lackawanna & Western Railroad would become the major carrier of anthracite from the northern fields to NYC (Dublin, Licht, 15-17). While the extensive railroad systems made transporting more efficient, they also lowered the price of coal in distant markets such as Philadelphia and NYC relative to the prices in areas surrounding the mines. In 1840 the wholesale price of anthracite in Philadelphia relative to the mine price was 3.6, and by 1864 the ratio was 1.3. A similar drop
Anthracite budgerigar mutation just one Anthracite allele correspond to the splits of recessive mutations. A single Anthracite factor has a similar effect to the Dark mutation, causing a Skyblue to become Cobalt in appearance - as was suspected with the English Grey. In fact, the similarity of the Anthracite to the English Grey is striking. The description is virtually identical, and the cobalt appearance of a Skyblue with a single Anthracite factor is exactly what was suspected for the English Grey. The interaction of the Anthracite and Dark budgerigar mutations has not yet been investigated. It is expected that a combination of the