Vitamin B12 Blood Levels Range and Test Results. Normal values of vitamin B12 in blood are between 200 to 900 picograms per milileter. Talk to your lab and request the specific values since every lab values ânormal rangeâ differently.However, these values arenât exactly correct because many people have been diagnosed with B12 deficiency even when their B12 levels were within the normal range.alk to your lab and request the specific values since every lab values ânormal rangeâ differently. However, these values arenât exactly correct because many people have been diagnosed with B12 deficiency even when their B12 levels were within the normal range.
The earliest settlers mined coal among the hills of south central Iowa. They used coal to heat their homes and cook their food in areas were timber was not available. Not until 1870 did the industry of coal mining begin to rapidly grow in Iowa. By that time the major Iowa railroads reached from the Mississippi River in the east to the Missouri River in the west. The railroads leased land in coal producing areas and operated mines which produced coal for the use of the railroads.
In 1820 the first commercial coal mine in Kentucky opened in the Western Coalfield in Muhlenberg County. In its first year the mine produced 328 tons of coal. By 1843 the state produced 100,000 tons of coal, and by 1879 the state produced one million tons of coal, all coming from the Western Coalfield.In 1900 the first commercial coal was opened in the Eastern Coalfield in the community of Betsy Layne in Floyd County.ust two years after the first coal was discovered in the United States in 1750 explorer Thomas Walker discovered coal in what would become Kentucky and used it to heat his camp fire. Although his discovery came in the Eastern Coalfield it would be another 150 years before commercial coal production occurred there.