The Positive Sciences of the Ancient Hindus c4.s2.10

c4.s2.10

Mono-Bhautic Earth substances:—Charaka and Susruta regard the following as Earth substances: gold, the five Lohas (silver, copper, lead, iron, and tin) and their "rust," arsenic, orpiment, various mineral earths and salts, sand, precious stones. (Charaka, Sútrasthána, Chap. I.; *cf.* also Susruta, Sútrasthána, Chap. I. पार्थिवाः सुवर्णरजतमणिसुक्तामनःशिलामृत्कपालादयः। सुवर्णस्य इह पार्थिवत्वमेवाङ्गीक्रियते गुरुत्वकाठिन्यस्थैर्यादिहेतुभिः। सूत्रे चादिग्रहणात् लोहमलसिकतासुधाहरिताललवणगैरिकरसाञ्जनप्रभृतीनां—Dalvana on Susruta, *loc. cit.*)