One marrow bone, half a pint of oil, ten cents' worth of citronella.
Take the marrow out of the bone, place it in warm water, let it get
almost to boiling point, then let it cool and pour the water away;
repeat this three times until the marrow is thoroughly "fined." Beat
the marrow to a cream with a silver fork, stir the oil in, drop by
drop, beating all the time; when quite cold add the citronella, pour
into jars and cover down.