Piesse's Pastils

• 1/2 lb. Willow charcoal 
• 6 oz. Benzoic acid
• 1/2 drachm Otto of thyme
• 1/2 drachm Otto of caraway
• 1/2 drachm Otto of rose
• 1/2 drachm Otto of lavender
• 1/2 drachm Otto of cloves
• 1/2 drachm Otto of santal

Prior to mixing, dissolve 3/4 oz. nitre in half a pint of distilled or ordinary rose water; with this solution thoroughly wet the charcoal, and then allow it to dry in a warm place.

When the thus nitrated charcoal is quite dry, pour over it the mixed ottos, and stir in the flowers of benzoin. When well mixed by sifting (the sieve is a better tool for mixing powders than the pestle and mortar), it is finally beaten up in a mortar, with enough mucilage to bind the whole together, and the less that is used the better.