Get good deodorized benzine, 60 to 65 gravity, and to each barrel of 42 gals. add 9 lbs. pulverised alum, 3½ oz. gum camphor, and 3½ oz. oil of sassafras, or 2 oz. oil bergamot; stir up and mix thoroughly together and it will soon be ready for use.

N. B. - As this fluid creates a much larger volume of light and flame than carbon oil, it is necessary to use either a high burner, such as the Sun burner, to elevate the flame away from the lamp, in order to keep it cool, or, instead thereof, to use a burner provided with a tube for the escape of the gas generated from the fluid, such, for instance, as the Meridian burner.