CI UNCLASSIFIED ig at the highest at any time since the Group was organized. g. laboratory Prior to 1949 the work of the Hematological Section of the Group vas largely concerned with routine and special blood counts of people exposed to various radicactive hazards, While hasards of radicactivi from many and varied sources are present, there also exists a group of hazards arising from common organic and inorganic compounds such as benzene, toluene, carbon tetrachloride, trinitrotoluene, mercury, lead, and a host of others. These substances act primsrily es poisens of the kidney, liver, or blood forming organs. In order to adequately protect employees exposed to these compounds, tests in addition to routine blood counts are necessary. In the past year, to attain this end, at least twelve new clinical chemical tests have been set up, pri merrily as a measure of liver and xidney function as these functions my be affected by exposure to specific campounds. Many of these liver and kidney function tests are done routinely on groups of em ployees so exposed in addition to the hematological examinations. During the past year nearly 4000 of these tests have been performed in addition to over 9700 routine hematological examinations. Had it been necessary to perform the clinical chemistries and the urinalyses on the outside, the cost to the Laboratory would have been nearly $12,500. Performing these tests within our own Group results in considerable saving to the Labcratory. One additional project of the Hematology Section has been the intreduction of blood typing of all -%- 130915 036 LO4KNTI LANL ae