Vol. VI, No. 8.] Aurvedic Metallic Preparations. 389 



[N.S.] 



tained after adjusting water level. The capacity of the tfask 

 was measured once for all by filling it with water. The differ- 

 ence between the two volumes of course gives the volume of 

 hydrogen. The following are the results of three blank 

 experiments : 



Wt. of iron 

 wire taken. 



Vol. of H. 

 at N.T.P. 



Wt. of H. 



calculated 



4485 

 4560 



2327 



178-2 c.c. 



181-6 c.c. 



92-8 c.c. 



•016038 



016344 

 •008352 



Wt. of iron 

 calculated. 



4490 

 4576 



2338 





Error 



+ -OOO.") 

 + 00 1 6 

 + 0011 



Qualitative and Quantitative Analysis. 



Qualitative analysis showed the presence of a small quan- 

 tity of soluble salt mostly potassium phosphate, siliceous 

 matter and iron. There was no carbon ( as we expected ), nor 

 any aluminium. The results of quantitative examination are 



given below. The 



<< 



one-puta, 



J 5 



if 



ten-puta ' ' and ' ' seventy. 



eight puta " " lauhas " are the products of heating the same 



sample of iron. The c ' hundred-puta ' ' and ■ * thousand-puta ' ' 

 u lauhas," both marked (A), are again the oxidation products 

 of another sample of iron. Lastly, the "thousand-puta" 

 " lauha " marked (B) is a different preparation. 



FeO 



1 ' One-puta lauha 

 (5 c.c. H only) : 



5 5 



012 



Siliceous matter. . 

 Soluble salt (most pot . 

 phos.) 



681 

 20-4 

 101 



"Ten-puta lauha." 

 Fe 

 FeO 

 FeO, 



Siliceous matter 

 Soluble salt 



nil. 



23*1 



400 



32 I 



4-k 



1-3 



99-912 



" Seventy-eight-puta lauha. 



>> 



Fe 



FeO 



Fe,0 2 



Siliceous matter. 

 Soluble salt 



• • 



nil. 

 9-5 



512 



34- 1 



•' Hundred-puta lauha 



(A) 



Fe . . 



FeO 



Fe 3 ; ;, . . = 



Siliceous matter . = 



99-8 



> ■> 



nil. 

 nil. 

 83 •■ 



12-7 



5-4 Soluble salt of which 



P O, 



!• 



3-7 



100-2 



1(X»3 



