Essence Of Flowers (To Extract). Procure the petals of any flowers that have an agreeable fragrance, card thin layers of cotton-wool, which dip into the finest Florence or Lucca oil, sprinkle a small quantity of fine salt on the flowers, and lay them on a layer of cotton and a layer of flowers, until an earthen jar or -wide-mouthed glass-bottle is full; tie the top close with bladder, then lay the vessel in a south aspect to the heat of the sun, and in fifteen days, when you uncover it, a fragrant oil may be squeezed out of the cotton mass altogether, which will be found little inferior to the celebrated otto of roses, if those flowers have been used.