Kerosene -

A mixture of liquid hydrocarbons distilled principally from PETROLEUM (which see). If of good quality, it is nearly colorless. It is closely related to the British Paraffin Oil and in England is sold as "American Paraffin Oil."

As Kerosene is of a highly inflammable nature, laws have been passed in different states which restrict its sale for illuminating purposes to certain degrees of "flash" or fire-test. It is safe at 130° flash, and is said to lose some of its qualities when further refined. Its boiling point should be above 170° Fahr. It should always be kept in a cool dry place and, so far as possible, closed against contact with the atmosphere.

To Test Kerosene Oil, put a small quantity of the oil in a cup, set in a tin of water and slowly warm the water, noticing the degree of heat in the oil by keeping a thermometer immersed in it. When the temperature rises, put a lighted match, or better still, an electric spark, quickly over its surface at intervals. As soon as the gas or vapor given off by the heated oil "flashes" or burns, its test is determined - that is, if it ignites when the mercury stands at 120° Fahr., it is oil of 120° flash test.

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