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167
Indians did not possess the knowledge of the use of
mineral acids for dissolving metals before the sixteenth
century AD. (Indians knew that metals could be dissolved
using naturally occurring mineral acids like Visodaka
which contradicts Ray's comment.)
The verse in Rasaratnasamu莽莽aya which gives the
preparation of "essence of alum" or sulphuric acid is
given below.
32 Tuvari or alum is purified when immersed
in k膩峁噅ika (or the fermented rice water or
crude vinegar) for three days. It (alum) when
rubbed with ks膩r膩mla (acidic salt) and heated
certainly gives its essence.
Here, instead of clearly specifying the name of
If we
the salt, the author just calls it acidic salt.
recognise the salt with ferrous sulphate (k膩sisa), then
In the very
the one given above is the required recipe.
next verse the author cautions the reader that this one is
an important synthesis and hence should be kept secret.
Probably this is the reason why he does not specify the
"acidic salt" to be used in the above method.
32.
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Rasaratnasamu莽莽aya see Primary Sources,
Section 3, 艢loka 64.
啶む�佮さ啶班�� 啶曕ぞ啶�啷嵿が啶苦�曕�� 啶膏た啶�啷嵿い啷嵿さ啶� 啶む�嵿ぐ啶苦う啶� [tuvar墨 k膩mbike siptv膩 tridi] 鈥�啶ㄠぞ啶氞�嵿�涏�佮う啷嵿ぇ啶苦ぎ啷佮�氞い啶� 啷�
啶曕�嵿し啶距ぐ啶距ぎ啷嵿�犩�堗�� 啶�啶班�嵿う啶苦い啶� 啶о�嵿く啶距い啶� 啶膏い啷嵿さ啶� 啶�啷佮�炧�嵿�氞い啶� 啶ㄠた啶多�嵿�氞た啶むぎ啷� 啷� [n膩cchuddhimucati |
k峁Ｄ乺膩m峁環ai岣� mardit膩 dhy膩t膩 satva峁� mu帽cati ni艣citam || ] 64 啷�
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