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

ं सुदुर्लभं." - wait! Look at that word:
It has two characters:
First: 'व' or 'ब'?
Second: 'धं'?
Wait, look at the character:
It's "वधं सुदुर्लभं" or "बद्धं सुदुर्लभं" or "बन्धं सुदुर्लभं"?
Wait, look at line 19: "बद्धो" (baddho).
In line 24: it's NOT 'बद्धं'. It has:
A letter with a loop, then 'धं' with anusvara: "बन्धं" or "वधं"?
Wait, look at footnote 15:
"D reads [ ] सुदुर्लभं."
Wait, could it be "च सुदुर्लभं"?
Look at the first letter: it has a horizontal bar on top, a loop on left, and a vertical stroke: that is 'ब' or 'व'!
Wait, is there an anusvara on it? Yes, there is a dot on top!
And the next letter is 'धं': with an anusvara!
Wait, "बन्धं सुदुर्लभं."!
Why would D read "बन्धं सुदुर्लभं"? Because the main text has "रसबन्धं सुदुर्लभम्"! D omits "रस" and reads "बन्धं सुदुर्लभं" (to make meter? But that would be 7 syllables: पुनरन्यं प्रवक्ष्यामि बन्धं सुदुर्लभं).