Preservation Ordinance 440-7

Scope

Preservation Ordinance 440-7 is an instrument of the Librarians governing the atmospheric conditions of Floor 440 and, by contested extension, the treatment of airborne matter as a category of catalogued information. Its operative clause fixes the floor's climate at 22°C with 65% relative humidity and mandates that the air carry ozonic and petrichor notes. The ordinance is cited with near-equal frequency by preservationist and by anti-preservationist factions, a circumstance the Subcommittee for Paradoxical Preservation has described as "the ordinary condition of a well-drafted text."

The ordinance derives its authority from Ordinance 7, under which all information — including the information carried by a smell — is to be preserved. Whether an aroma constitutes information, and whether its preservation is separable from its continuous production, has occupied three separate Concordances and one hanging subcommittee since the ordinance's sealing.

Text and Sealing

440-7 was sealed in the winter of the Long Catalogue, during the administration of the Architectural Preservation Guild, which held custodianship of Floor 440 at the time. The Guild's minutes record the ordinance as a response to a complaint filed by the Indexer Marenne Holt against "an odour of unspecified origin, allegedly destructive of shelf vellum." Holt's complaint is preserved in full; the odour she described is not, and no subsequent survey has located it.

The ordinance's four operative clauses are conventionally summarised as follows:

• the temperature of Floor 440 shall be maintained at 22°C, measured at the north stairhead;
• relative humidity shall be held at 65%, sampled twice daily;
• the atmosphere shall be scented with ozonic and petrichor notes, in whatever quantity the attending clerk judges the floor to require;
• no introduced aroma shall be treated as a contaminant.

Clauses 1 through 3 are routinely enforced. Clause 4 is the clause over which disputes have arisen, because it reverses the position previously maintained by Preservation Mandates in respect of foreign introduced by visiting clerks — a matter the Traditionally-Indexed school has never formally conceded.

Relationship to Ordinance 7

Ordinance 7 requires the preservation of all information without qualification. The drafters of 440-7 took this to mean that a floor's prevailing smell was itself a record of what had occurred on that floor, and that to clear the air would be to destroy a catalogue entry by means of a window. This reasoning was upheld by the Concordance of Second Recension but appears to have been contradicted by a later amendment, whose date the archives do not agree on; the two candidate years are eleven apart.

The Traditionalist Indexers have argued from the ordinance itself that, since an aroma can be neither indexed nor shelved, it falls outside the domain of Ordinance 7 and may therefore be admitted or expelled at the clerk's discretion. The Society for the Preservation of Ambiguity rejects this reading on the grounds that it would make Floor 440 the only floor in the Tower whose air has no standing, a position they describe as "geographically absurd."

Petrichor

The petrichor clause has proven the more durable irritant. Petrichor is, by definition, the scent produced by rain striking dry earth; Floor 440 has no exterior and receives no rain. The Architectural Preservation Guild therefore maintains the scent by mechanical means, a device known within the Guild as the Small Weather. Its operation is scheduled for the fourth hour of every second day and produces, in the words of the attending clerk's log, "a smell of outside, without the outside."

Attempts to substitute a genuine exterior scent have twice been blocked under Ordinance 4, which reserves the Tower's foundational truths against proposed improvements. A third proposal, to admit a quantity of actual rainwater via the service stair, remains open before the relevant subcommittee and has been tabled at four consecutive sittings.

Incident of the Sealed Window

In the winter of the frost ledger, a maintenance clerk sealed the only window aperture on Floor 440 as part of a general draught reduction. The ozonic note, no longer replenished, thinned over nine days; the petrichor note, being mechanically generated, did not. The resulting imbalance produced a smell described in the incident report as "half a rainstorm, arriving at the wrong time." The clerk was not disciplined. The window was reopened. The incident report is indexed under three separate floors, none of them 440.

Interpretation

The prevailing reading, set out in Concordance 22.1 by analogy, holds that a preservation ordinance may compel the continued presence of a thing without regard to whether that thing was ever present before. Floor 440's atmosphere is thus not preserved but permanently invented, and the distinction is held not to matter. The Doctrine of Coincidental Preservation would disagree, requiring among other conditions that preserved objects be separated by five floors from their sources; 440's source, if it has one, has never been identified.

Visitors are reminded that Floor 440 admits no unsealed foodstuffs, and that the north stairhead thermometer is to be read but not adjusted.