Technicians experiments with chemicals and record readings in United States.
United States USA Date:1948 Duration:1 min 23 sec Sound:NO SOUND
A technician engaged in a titration experiment in United States. The indicator color appears in the flask at the end of titration. Distillation in twin necked flasks on a table. A technician adds chemical in one tube from over one of the neck of a flask. The chemicals in the flasks are shaken. A technician records readings. An experiment set in a chamber. A technician views the experiment.
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