Men carry out experiments to check the quality of petroleum products in the U.S.
United States USA Date:1923 Duration:2 min 32 sec Sound:NO SOUND
Quality of petroleum products is checked and scientific research for further improvement is carried out in the United States. A man carries out an experiment to check the quality of a petroleum product. He heats the product on a Bunsen burner using a pair of tongs. Then he lights a lamp using the petroleum product. Another researcher looks through a tube at a screen and makes some adjustments. He makes a note on a container and pours in the container. Scientific glass apparatus in a box on a stand. A man looks at them. He makes a note on a paper and takes a look at a paper in his hand.
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