रसार्णव (शैव रस-तन्त्र - प्राचीन भारतीय खनिज रसायन, धातुवाद एवं रस-चिकित्सा सटीक)

or व्छु or च्छु: Wait, in Bengali/BMP Devanagari font, is it च्छु? Look at footnote (12): तच्छुष्कपुटनात् has च्छु. Compare the letter in line 15 with च्छु in footnote (12): In footnote (12), तच्छुष्क: त then च्छु has the EXACT same glyph! Wait, in line 15, is it पुटनाव्...? No, the letter before it is ना! Then च्छु! Wait, let's look: पु ट ना च्छु ष्क पु ट ना त्! Wait, why did I think there was a व्? Ah, between ना and छ, is there a व्? Look at line 15: पु ट ना then च्छु? Wait! Look at the space: पु ट ना then a letter... wait, look at the glyph: It is व्छु or च्छु? Wait, look at footnote (12): पुटेन तच्छुष्कपुटनात् -> त च्छु ष्क... In line 15: पुटना then च्छुष्कपुटनात्? Wait, look at line 15: `