The Materia Medica of the Hindus, compiled from Sanskrit Medical Works c4.s3.22

c4.s3.22

शङ्खद्रावक *Sankhadrávaka*. For this preparation take of sulphate of iron thirty-two tolás, alum and rock salt sixteen tolás each, nitre one hundred and twenty-eight tolás, powder, mix and distill the mixture from a glass retort. The dose of this acid is said to be twelve minims. The tongue should be anointed with clarified butter before using this medicine. It should not also touch the teeth.