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realgar tā 3, (make) their finest powder, Take tin weighing 1/4 part of these medincines, make the leavs of tin, make them dry twice or thrice, place them into a Śarāva-Sampuța-one above another, put 3 layers of clay and cloth over it. Next it is to be heated (roasted) in gajapuța fire for two praharas. When it becomes cold it is to be taken out. Tin gets killed.?
The Chemical process of making tin fixed. Make realgar fine, and rub it in a mortar with the juice of Sesbania glandiflora (Agastapuşpı). Give puțas (roastings) to tin infused with the juice of citrus medica and with the powder of purified realgar three times, It becomes gold-like or silver-like (Kaladhauti) ?
That is 21 saturations (bhāvanās) are to be given to the finely powdered and rubbed realgar by grinding with the juice of sesbania glandiflora. It is purified, next purifying tin with the juice of citrus medica twice, thrice, four times, and treatment of heat) melting good tin it is to be given prativāya with the powder of realgar three times. On the third time it is to be poured into oil, it fixes tin.3
Sisā or Sisaka or Nāga (Lead)* According to the Rasārņava, lead is of one kind. It is readily fusible and very heavy and soft.6
"It presents a black and bright appearance on fracture. It ir of foetid odour, and black exterior.?
The process of purification of lead. The Suvarņa-Raupya-Siddhiśāstra refers to some processes of purification of lead in the following manner.
(1) Melt lead with Misarı Sabu (a kind of soap), it removes dirt (blackness) of lead when put into the soap, go on putting it, lead becomes white.
1. Ibid., Ch. 2. 1.10, (Comm.) 2. SRSS., Ch. 1, 48. 3. Ibid., Ch. II. 1.48 (Comm.) 4. SRSS., Ch. II. 6, III. 3, 4, 105, IV. 4, 25, 30, V. 12, 24, 31, VI. 9,
13, (Naga), 14, 22, 38, VII. 17, 19, 24, VIII. 1, 27, 32, 33, IX. 8, 15,
42, 57, X. 63, XI. 38, XI. 2, 23, 39, XIII. 4, 12, 17, 5. Nāgastvekavidho devi śighradrāvi mệdurguruh || Rasārņava. 7.10. 6. Ibid. 7. "Drutadrāvam mahābhāram chede krsnasamujjvalam/
Pūtigamdham bahiḥ kṣşņaṁ suddham sisamato' anyathā”,
Rasaratna Samuccaya, 5/170. 8. SRSS., Ch. 9.57.
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