51B-01-007 (30 April 1985) --- Astronaut Don L. Lind, 51-B Spacelab 3 mission specialist, observes the growth of mercuric iodide crystal in the vapor crystal growth system (VCGS) on the Spacelab 3 science module aboard the orbiter Challenger.
Astronauts Don Lind observes growth of crystals in VCGS aboard orbiter
Astronaut Norman E. Thagard, mission specialist for the "silver" team, rests on the middeck while the "gold" team is on duty in the science module. Don L. Lind, left, "gold" team member, meanwhile participates in autogenic feedback training (AFT), designed to help flight crewmembers overcome the effects of zero-gravity adaptation.
Astronaut Norman Thagard rests on middeck while other team is on duty