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.
There has been a steady rise of coal production in the last decade. The total world production of coal increased from 2224.6 million tons of oil equivalent in the year 1991 to 33336.9 million tons of oil equivalents in the year 2009. The first coal production started in U.S in the year 1748. 2  In the year 1750, Dr. Thomas Walker first discovered the use of coal in Kentucky. 3  From the year 1820 to 1860 Kentucky coal production shot up from 382 tons to 285,760 tons per year.