The geophysical activities at the Atmospheric Ionization Laboratory in Cambridge, Massachusetts. The men operate research equipment. A man operates telegraph recorder. A man and a woman study an instrument designed to check the small fluctuations in atmospheric pressure. A woman writes the speed of the air on a paper. A water table and a man operates it. Another man measures amplitude signal. A man studies a graph used to record earth motion for scientific study. A man puts the graph in a wooden box and is attached with parachute. A radio carrier signal.
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