Anandakanda 1.4.180

1.4.180

evaṃ kuryāccaturvāraṃ tatsatvaṃ grasate rasaḥ /
<tṛtīyaḥ prakāraḥ>
mṛtābhrakaṃ ṣoḍaśāṃśaṃ taccaturthāṃśakaṃ trapu //

One should do this four times; the mercury swallows that essence.
<The Third Method>
Incinerated mica [one part], a sixteenth part of that of tin,