1 oz (28 g) lime juice (a former ingredient, evidently, that Coca-Cola now denies) or a substitute such as a water solution of citric acid and   sodium citrate   at lime-juice strength. Mix together 1 ⁄ 4   drachms (0.44 g) orange oil, 1 ⁄ 10   drachms (0.18 g)   cassia   (ashwins n