Skylab 2 Experiments

S73-27509 (6 June 1973) --- Scientist-astronaut Joseph P. Kerwin (right), Skylab 2 science pilot and a doctor of medicine, takes a blood sample from astronaut Charles Conrad Jr., Skylab 2 commander, as seen in this reproduction taken from a color television transmission made by a TV camera aboard the Skylab 1 and 2 space station cluster in Earth orbit. The blood sampling was part of the Skylab Hematology and Immunology Experiment M110 series. Photo credit: NASA