No. 1. Carbonate of Soda (Sal) 1 lb. Carbonate of Potash 1 lb. Yellow Prussiate of Potash 1 oz. Bromide of Ammonium 1 oz. Water 64 oz. No. 2. Pyrogallic Acid 1 oz. Saturated Solution Sulphite Soda 15 oz. Keep No. 2 in glass-stoppered bottle.