Procedure Text (cuneiform)

proh-SEE-jer TEKST

babylonian: Procedure Text (modern scholarly genre-label for ACT 200-299 + 800-899 corpus)

Definition

A Procedure Text is the Late-Babylonian cuneiform text-genre that records the computational rules and parameters for generating lunar or planetary ephemerides, as distinct from the ephemeris itself (which records the resulting tabulated values). The two genres together constitute the ACT corpus: in Neugebauer's Chapter V §46 classification, the procedure-text holds the rules and the ephemeris the computed columns. Hunger-Pingree estimate the surviving corpus at roughly seventy tablets, mostly fragmentary.

In Tradition

Neugebauer, Hunger-Pingree, and Rochberg concur in pairing procedure-text and ephemeris as the two complementary ACT text-classes. Hunger-Pingree describe Procedure Texts as "consistent and powerful sets of rules" that allowed Babylonian scribes "to generate tables permitting one to foretell the longitudes and times" of lunar and planetary phenomena. The Procedure Texts contain step-function zone parameters, zigzag M / m / Δ / d values, retrograde-arc rules, and per-phase synodic subdivisions.

In Practice

For the student of Late-Babylonian mathematical astronomy, the Procedure Text is the rule-bearing companion that explains how the ephemerides were computed. Hunger-Pingree organise the ACT-genre: ACT 200-299 for lunar Procedure Texts in Volume 1; ACT 800-899 for planetary Procedure Texts in Volume 2; eleven Ephemerides whose colophons embed Procedure Text material. The planetary Procedure Texts ACT 801, 802, 811, 811a, 812, 813, 813a-b, 814, 816-819, 819b-c, and the Procedure Text attached to ACT 420 (= 821b) supply the primary documentary basis for reconstructing Systems A and B. Neugebauer cautions that the Procedure Texts cannot stand alone as computational manuals — their terminology is unclear, the tablets are damaged, and they may have required supplementary oral teaching. They are used in practice as testing material for rules abstracted from the completed ephemerides.

Historical Origin

Attested across the Seleucid-period ACT corpus from Babylon and Uruk (c. 4th-1st c. BCE); colophons attribute several Procedure Texts to named scholars Kidinnu (System B teršītu) and Nabû-rimannu (System A, on Schnabel's hypothesis). Modern critical treatments: Neugebauer, *Astronomical Cuneiform Texts* (1955), the foundational edition; *The Exact Sciences in Antiquity* (1957/1969), Ch. V §§46, 52 pp. 105-106, 120; Hunger-Pingree, *Astral Sciences in Mesopotamia* (1999), Ch. II §C4.2 p. 230 and §C.2.4-2.5 pp. 264-281.

Definition

In Tradition

In Practice

Historical Origin

Further Reading