बृहद्विमानशास्त्रम् / वैमानिक शास्त्र (महर्षि भरद्वाज - पं. ब्रह्ममुनि परिव्राजक सविस्तार हिन्दी व्याख्या)

? "यन्त्रमूले" means "at the base of the machine". That makes sense too!
Let's look at the matra under म: it curves down to the left, which is ू!
Wait, let's look at कुण्डे in line 25: कु has ु (curves left/up).
In मूषायां (line 24): मू has ू (curves down to the right).
In line 28: under म, the stroke goes down to the right! So it is मू!
And the next letter is ले: यन्त्रमूले सम्पूरयेच्छनैः ।
Yes! यन्त्रमूले सम्पूरयेच्छनैः ।

Line 29:
चपलग्राहक लोह भवेत्पश्चाद् दृढं मृदु ॥ १४२ ॥
Wait, is there a space between चपलग्राहक and लोह?
Yes: चपलग्राहक लोह भवेत्पश्चाद् दृढं मृदु ॥ १४२ ॥

Now let's check lines 30-33 (Hindi):
Line 30:
चूना, ग्राव श्वेत—श्वेत ग्राव—सङ्गममर, निर्यास—गान्ध, मृत्—सोरठ मिट्टी, काच, मधु-
Wait:

• चूना,