Marrow

Keep every observation in the margin of the thought that needs it.

Folders bury notes in the past. Marrow treats your notebooks like a naturalist’s herbarium: whenever you cite an earlier observation, that slip appears immediately in the right-hand margin so you can compare, annotate, and write without losing your place.

Drafting: Passive climate control in historic stone libraries
Click any underlined blue pencil reference in the text to inspect its field slip in the margin
Treatise Draft, Chapter IILast revised today at 11:42

Why sixteenth-century reading rooms rarely required mechanical intervention

Modern archival vaults rely on continuous chillers to hold temperature steady, yet older stone repositories achieved comparable stability through mass and geometry alone. When we examined , the interior wall surface barely registered afternoon heat waves until midnight, long after the shutters were barred.

In warmer Mediterranean latitudes, mass alone is insufficient without a heat sink. Builders paired deep masonry with so that pre-cooled air drifted across shaded cloisters before entering the reading room floor.

Paper and parchment care even more about moisture than temperature. Our measurements of and breathable lime plasters show that unpainted mineral surfaces absorb dampness during rainstorms and release it during dry spells, while exhausts stagnant air through solar-warmed masonry flues.

Referenced field slips:

How a field observation matures into a finished argument

Because thoughts rarely arrive in their final outline, Marrow preserves every stage of a note’s growth across time.

  1. 1. Field jottingDay one

    Capture the raw measurement before it fades

    Drop a quick sensor reading, a photograph of stone tooling, or a half-formed question into your daily sheet without deciding which folder it belongs to.

    “North wall feels cool to the palm at 4pm despite 31°C outside; check wall thickness on survey drawing.”
  2. 2. Cross-pollinationThree months later

    Notice unexpected kinship across notebooks

    As you write a new note in winter, Marrow surfaces your autumn field slips that share vocabulary or citations, linking them with bidirectional thread.

    Linked to [[Hygroscopic buffering of lime-plastered vaults]] and [[Stack-effect flues]].
  3. 3. Manuscript synthesisYear end

    Write with your evidence open beside you

    Pull a dozen linked slips into the margin of a fresh draft. Drag verified quotes directly into your prose while keeping every citation intact.

    Exported as clean Markdown, LaTeX, or archival PDF with complete footnote lineage.

Search across decades of notebooks in milliseconds

Every slip is stored on your disk as plain, human-readable text. Filter the sample botanical and architectural ledger below, or click any entry to load its connected slip into the manuscript desk above.

Capillary rise in lime-mortared rubble foundations

Sacrificial lime renders draw dissolved salts outward from the structural core, preserving interior frescoes.

Notebook II, Folio 84 (19 May 2025)Inspect linked margin slip

Acoustic absorption of coffered larch ceilings

Deep timber coffers scatter mid-frequency speech reflections while preserving low-level ambient quiet.

Notebook IV, Folio 12 (02 October 2025)Inspect linked margin slip

Night-sky radiant cooling on limewashed roofs

High-albedo calcium carbonate surfaces radiate long-wave infrared heat into clear nocturnal skies.

Notebook III, Folio 99 (11 August 2025)Inspect linked margin slip

Oak gall ink permanence on rag laid paper

Balanced iron-tannin complexes bind into linen fibers without eating through the sheet when buffered with chalk.

Notebook I, Folio 4 (07 February 2025)Inspect linked margin slip

Begin your own field archive today.

Marrow runs locally on macOS, Linux, and iOS. Your notes remain in a plain folder of Markdown and SVG files that you own forever, with no account required to start writing.

Explore the sample notebook