Scale compares the color of blood soaked paper with a standard, allowing one to determine hemoglobin content

The answer is the tallquist method. 

The Tallquist strategy utilizes an exceptional test paper and is a straightforward, more affordable test that should be possible more rapidly than the hemoglobinometer technique. The hemoglobinometer instrument is intended to think about the shade of light going through a hemolyzed blood test with a standard shading.