Measurement Unitstubschool: pan-indian· Bṛhat Saṁhitā

Drona (volume/weight measure)

droṇa

uni-drona

Definition

A measure equated by Bhat to 256 palas, used for the boiling-volume of vajralepa (57.4: boil in a drona, reduce to 1/8 = 32 palas).

Classical

Prāṇa relation not yet traced — a complete, acceptable terminal state.

measured-by · 1

←Preparation and use of adamantine glueClassical
BS 57.4 specifies the boiling volume and reduction ratio in drona/pala.

txt-brihat-samhita57.4Classical✓ verifieddrona as boiling volume, reduced to 1/8
txt-bs-bhat-1981note on 57.4Modern✓ verified1 drona = 256 palas
txt-brihat-samhita55.18Classical✓ verifiedDrona used as a water-measure in the tree-fertilizer recipe (1 drona water for one tree)

brihat55.18 (with Utpala's measure-verses) cross-confirms the measure system: 1 tula = 100 palas, 1 adhaka = 64 palas, 1 prastha = 16 palas, 1 drona = 256 palas. The 64-pala adhaka matches 53.94's earth-weight test exactly, and 256/64 = 4 adhakas per drona — internal consistency across three chapters (53, 54, 55). New unit stubs in §E.

Ratio Definition: 1 drona = 256 palas (per Bhat's gloss); 1 adhaka = ¼ drona (cf. 53.94's adhaka of earth = 64 palas, which is consistent: 256/4 = 64)
Cross Ref Note: The 64-pala adhaka of 53.94 (ground-weight test, Step 2) and the 256-pala drona here are consistent on a 4-adhaka drona — a small internal-consistency win across chapters.