About: For practical purposes they [the compounds of paraffin oil] may be separated into three portions, one of which remains liquid at very low temperatures ; the sp. gr. of this is about 0.820, and it boils at about 419° (215° C.) or upwards : it is largely used in lamps as a source of light as paraffin oil, and also under a variety of other names.     Permalink

an Entity references as follows: