Guild of Atmospheric Balancers

The Guild of Atmospheric Balancers is a sworn body of the Tower entrusted with the equalisation of air between floors of unequal pressure, and with the certification of the weights that keep that equalisation honest. Its members are not, despite frequent confusion in the popular indexes, the same as the Atmospheric Integrity Guild, from which it separated in TY 6889 over a matter of measuring instruments; the two bodies now maintain separate registries and a courteous, unbroken coldness. The Balancers hold their charter under Concordance 4411, ratified in the same year the Kestrel Commons was franchised, though the two documents have never been read together without an argument.

Origin and partition from the Integrity Guild

The Guild was founded in the winter of TY 6889 on the eighth floor of the Lambda Shaft, at that time still under shared supervision. The precipitating dispute concerned the practice of trimming counterweights against a rising column of air: the Balancers held that a balance once struck was a fact about the air and should be recorded as such, while the Integrity Guild held that air could not be a party to a legal instrument and that the weight alone should be entered. The schism was resolved by the Partition of the Sixth Landing, TY 6891, which awarded the Balancers exclusive right to certify weight, and the Integrity Guild exclusive right to certify air. That a weight cannot be certified without reference to the air it displaces has been noted in every recension since, without remedy.

The founding register, kept in iron-gall ink on the third landing, lists forty-one names. Thirty-nine of them appear elsewhere in the archive under other trades. The Guild has never clarified this and has twice declined to.

Instruments and the balance stations

The Guild maintains forty-two balance stations, of which thirty-eight are in use. Each station holds a hanging beam, a set of graduated counterweights in twelfth-fractions, and a draught-glass for reading the local air against the certified standard. The stations report annually to the Office of Atmospheric Cataloguing, which files the returns under the Atmospheric Calibration series; the returns are correct and largely unread.

Every Balancer carries a personal plumb-line stamped with their enrolment number and the sigil of the Guild. Plumb-lines are not to be lent to members of the Guild of Engineers, a prohibition that dates from the disagreement of TY 6912 and was reaffirmed without debate on every occasion since. The Guild's position is that the Engineers' practice of testing a floor's level with a rolling marble is an insult to a measured instrument; the Engineers have never answered the charge in writing.

Interaction with the atmospheric bodies

At Atmospheric Reclamation Station 7 the Guild is represented by a standing balancer, whose function is to confirm that the air reclaimed and the air discharged are of equal measured weight. The arrangement is overseen by the Atmospheric Integrity Guild under Concordance 7123, and the Balancers have accepted the oversight while quietly contesting the arithmetic. Their submission of TY 7136 to the Atmospheric Intent Meter returns argued that the meter's readings ought to be balanced against a certified counterweight before being entered at all. The Guild of Theoretical Mechanics endorsed the proposal as an evident truth; the School of Literal Mechanics rejected it during the Western Atmospheric Spiral calibration crisis, and the proposal has remained in the annexes since.

The Guild also services the Condensation Conduits between the fourth and eleventh floors, weighing the collected condensate against the certified vapour intake. Where the two figures disagree by more than one twelfth, the Balancer on station is required to re-weigh the air rather than the water. This has never once resolved a discrepancy, and the practice continues.

Doctrine of the balanced column

The Guild's central teaching is that air possesses a natural rest which human occupation disturbs, and that the Balancer's office is to return each floor to its rest without troubling its neighbours. This is set out in the Doctrine of the Balanced Column, TY 6902, a document of nine folios that has been amended fourteen times. Its most quoted article is the fourth, which holds that "no floor may be brought to rest by any weight not entered in the common ledger," a provision cited in almost every subsequent dispute and understood differently by every party citing it.

"Where the column is found out of true, the Balancer shall not correct the floor. The floor is not at fault. The column is corrected, and the floor follows at its own pace."

— Doctrine of the Balanced Column, TY 6902, Annex 2

Dispute over coincidence of record

A long disagreement persists between the Balancers and the Atmospheric Integrity Guild over whether a balance struck and a balance recorded are the same balance. The Integrity Guild holds, following the Report on Atmospheric Anomalies (TY 7124), that an unrecorded balance is indistinguishable from atmospheric drift and must be treated as such. The Balancers hold that the weighing is the fact and the ledger merely its witness. Both positions are supported by clauses of Concordance 4411, which was amended in TY 6944 to say both things and was never amended again.

The Guild's own archivist, Clerk Ondrej Mattha, filed in TY 7151 a memorandum observing that the two readings could be reconciled if the ledger were weighed. The memorandum was received, stamped, and filed without comment; Mattha's subsequent request for a reply was answered in TY 7163 with a note that his memorandum had been correctly filed, and no further reply is expected.

Membership and current standing

The Guild admits by apprenticeship and examination in weights, draughts, and the reading of old ledgers. Its membership stood at one hundred and six in the last return; the scroll is kept at the sixth landing and is said to be legible.

Balancers are not to be addressed while the beam is in motion, and are not to be thanked for a corrected column, as thanks disturb the reading. The Guild presently disputes with the Ventilation Consortium over the balancing of the Annex Theta-7 Aortic Shaft, which it shares with that body, and expects the matter to be settled by citation of a Concordance neither party has yet read to the end.