Tin. 



69 



is no proof of its being found hi the present day in tho peninsula 

 of India yet it is abundant on the opposite coast of the Bay of 

 Bengal, as in Burma, Tenasserim, Junkseylon and Malacca. 

 There must in very ancient times have been a trade between 

 India and these places.' ' 



Tin is purified by melting it over the tire and pouring the 

 melted fluid into the milky juice of Calotropis giganlea (arlai). 

 It is prepared for medicinal use by melting it in an iron cup, 

 adding to it one-fourth part of its weight of yamkshdm (impure 

 carbonate of potash) and powdered tamarind shells, and agitating 

 with an iron rod till the mass is reduced to a fine powder. It is 

 then washed in cold water and dried over a gentle fire. The 

 resulting product is a greyish white powder consisting chemically 

 of oxide of tin with some impurities. It is chiefly used in urinary 

 disorders in a variety of forms. Thus the simple powder may be 

 given in four-grain dose every morning with honey, or one of the 

 following preparations may be used. 



Trinetrd rasa. 1 Take of prepared tin, mercury and sulphur 

 equal parts, rub them together in an iron mortar and soak seven 

 times respectively in the juice of Cynodondacfyhrn (durvd) and the 

 decoctions of liquorice root, gum of Bumbax Malabar/cum (Mocha* 

 rasa), and Tribulus terrestris (gokshura). Then roast in a covered 

 crucible, again soak in the above mentioned fluid medicines and 

 make into four-grain pills. This medicine is given with a 

 decoction in milk of the above named vegetable drugs, in painful 

 micturition. 



Vangesvara rasa. 2 Take of the preparation of mercury called 

 Rasastndura, and of prepared tin, equal parts and mix. Dose 

 about four grains with honey in urinary diseases and diabetes. 



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