The Bureau of Mines developed two methods for determining iron II and iron III in 2- to 5-mg samples of coal using elec- 4 tron ... The method using solid samples was more simple, technically, but required the use of X-ray fluorescent analysis, or another ... TECHNICAL PROGRESS REPORT Technical Progress Reports make known new or improved systems and techniques in ... The Bureau of Mines has conducted a research program to systematize the art of locating uncharted andanbsp;...
|Author||:||United States. Bureau of Mines|