आयुर्वेद प्रकाश (माधव उपाध्याय - रसशास्त्र, पारद शोधन व धातु भस्म निर्माण सटीक)

र्द्धितमस्य- that'sद्विद्वि. Here, look at द्दैorर्दर्घ: The first letter has a top horizontal, down, loop/curl... it's a द! Underneath or next to it: another द? Wait, look at दinप्रतिदेशमस्ति(line 2): standardद. Here, it's द्+दै->द्दै! Wait, but does it have two slants? Look at the top of the letter: there is one slant? No, look: There is a repha र्above? Wait, let's look at the transliteration of this standard verse in Rasashastra literature! Search memory for the verse:स्याच्चेत्साङ्घ्रियवोपमः पविरथो माने गुरुस्तण्डुलः क्षीयेतास्य मणेरथ द्विगुणितं मौल्यं क्षयेऽयं क्रमः । इत्थं युक्तिबलाद्विचार्य चतुरो मौल्यं मणेरादिशे- ......... वज्रवर्ष्मणि यथा दोषे क्षयं कल्पयेत् ॥४३॥`

What is that missing quarter? Meter is Śārdūlavikrīḍita: --~ ~~- - ~~- --~ --~ - Let's scan line 23-24: इत्