Rasadhyaya 169_206

169_206

Having placed into a four-footed iron mortar calamine essence and mercury that has digested realgar essence, sixty-four times less than that, grinding it with blue-vitriol salt flux, one should kindle a gentle fire below. / And when this calamine essence is digested, the same is to be added again in a sixty-fourth part. / Adding it repeatedly in this way, calamine essence eight times the mercury is to be calcined and digested. / Then the mercury becomes unctuous, or it now digests diamond through the digestive tract upwards. / Thus ends the seventh [process], the calcination-digestion of calamine essence into that [mercury] which has digested realgar essence.