No other one organ has as many functions to perform in the body as the liver. It is this fact which necessitates an accurate and practical evaluation of the many liver function tests in use today. So many new tests have been developed in the last few years that it is hard for technicians end doctors alike to keep up to date on new procedures and fully understand the significance of the results obtained. The purpose of this study is to show the value of sane of the more common liver function tests in determining hepatic cell function, by correlating the results of these tests with clinical diagnoses and autopsy findings. In addition, two of the very newest tests, the Transaminase Test and the Copper Acetate Flocculation Test will be discussed in some detail and also correlated with clinical findings.