Spectroscope of Latent Grain

The Spectroscope of Latent Grain is a bench-mounted optical instrument of the Office of Latent Properties, held on Floor 640-C and trained at all times on a sealed grain hopper of unknown provenance. It does not examine grain. It examines the grain such grain might have become, refracting a narrow beam through a specimen and dispersing from it the spectral signature of the structure that was never built. Its readings are filed weekly with the Granular Standards Bureau, which has never once requested them.

The instrument is not to be confused with the Chrono-Refractive Spectroscope on Floor Ǣ-307, though the confusion is made daily by clerks who file by title and not by floor. The two instruments share a maker's mark, a bench profile, and a claim to the word spectroscope; they share nothing else, and the Chrono-Refractive Spectroscope Adjudication Committee has declined on four occasions to rule on the question of which is the elder, on the ground that it governs the one and not the other.

Design and operation

The instrument comprises a lantern housing, a prism train of eleven elements cut from Ergodic Wood and steeped in a fixative derived from Candlewood, and a receiving plate of ground fluorspar. A specimen is placed in the hopper, the lantern is lit, and the plate records what the specimen's unrealized successors would have dispersed, had they been built and had they been transparent. The plate is developed in the ordinary way and read against the latent band chart maintained in the office's second scriptorium.

The manufacturer's plate on the housing gives the tolerances, the year of completion (Year 4,112 by the reckoning of the internal seal, whatever the external seal says), and a single line of instruction that has never been expanded and never been rescinded: the lantern is to be extinguished before the hopper is opened, and not after. The office enforces this without comment.

Operation does not produce grain. It produces a spectrum. The distinction has been the subject of two memorials to the Office of Granular Audit and one to the Committee for Non-Intersecting Jurisdictions, none of which has disturbed the arrangement.

Relation to latent doctrine

The Spectroscope is the principal instrument of the doctrine of Latent Structure Tapping as it applies to cereals and other granulated bodies. Where the Latent Resonator interrogates a specimen's unrealized structure by vibration, the Spectroscope interrogates it by dispersion; the two methods are held to be complementary, though in practice the Resonator is used on small objects and the Spectroscope on quantities, and no one has ever run both on the same hopper to see whether the results agree.

The office's founding tract, the Treatise on Latent Architectonics, describes an unnamed refracting apparatus in its seventh chapter, in a passage that most scholars read as a description of the Spectroscope and a minority read as a description of a window. The passage is not illustrated. The School of Latent Materialism has published twice on the question and has changed its position once; see under Controversies.

Cultivars of Latent Flora records that no latent cultivar has yet been isolated from the Spectroscope's output, and that this is expected, the instrument being trained on the unrealized and not on the grown.

Disputed provenance

The question of the Spectroscope's origin is governed, or at least surrounded, by the Third Concordance and the Fourth Concordance, which disagree. Annex 2 of the Third assigns the instrument to the Office of Latent Properties in perpetuity, "together with its hopper, its lantern, and the air immediately about it." Clause 9 of the Fourth assigns the same instrument, described only as "the refracting engine of Floor 640-C," to the Guild of Grain as custodial property of the granulated trades.

"The engine passes to the Guild, with all hoppers, together with the air about it, which is not to be severed from the engine on any account."

— Fourth Concordance, Clause 9

The air is the sticking point. Annex 2 of the Third had already granted the surrounding air to the office, and so the Fourth grants the same air to the Guild — a contradiction that the Committee for Non-Intersecting Jurisdictions resolved in Year 5,904 by declaring the air to be held jointly and the Spectroscope to be held by whoever had it. The Guild has never come for it. The office has never offered. In the winter of Year 6,011 a Guild assessor did visit Floor 640-C, measured the hopper, and left without the instrument, having noted in his report that the air was not in a fit condition to travel.

The School of Latent Materialism holds that the maker's mark is a later addition, and that the instrument is older than either Concordance; the Office of Latent Properties holds that the mark is original; the Guild holds no opinion and has said so in writing. The three positions are on file and are cited against one another to this day.

Incidents

In the winter of Year 5,988 a relief clerk by the name of Ottilie Varn, then in her second year with the office, developed the receiving plates out of order — the morning's plates before the previous evening's — and read a latent spectrum from a specimen that had not yet been placed in the hopper. The plate showed the unrealized structure of a grain that would, if built, have been brought to the hopper the following morning. The office logged the plate without comment, filed it as anomalous, and reassigned Varn to the hopper schedules. Her grievance, submitted on the grounds that she had been reassigned for an error in the plate sequence and not for the reading, was heard by the office's standing examiner and dismissed. She remained on the schedules until her retirement and is remembered for the neatness of her hopper logs.

The Spectroscope has twice been removed from Floor 640-C. On both occasions it was returned within the quarter, once by the office and once, without explanation, by the Granular Standards Bureau, which had not asked for it.

Maintenance and holdings

The instrument is cleaned on the first working day of each quarter and recalibrated against the latent band chart every second year, the chart being amended more often than the instrument is calibrated. Its accessories are recorded in the office inventory as follows:

• One (1) sealed hopper, provenance unrecorded, weight stated on the tag as "sufficient."
• Eleven (11) prism elements of steeped Ergodic Wood, one of which is a spare and is not in the train.
• One (1) receiving plate of ground fluorspar, chipped at the corner, serviceable.
• One (1) copy of Annex 2 of the Third Concordance, annotated in a hand the office has not identified.
• One (1) lantern, which is to be extinguished before the hopper is opened.

Requests to view the Spectroscope are granted to holders of a Floor 640-C reading pass and are received at the second scriptorium. The hopper is not opened for visitors, for the reason stated above.