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Helena Vasques (@meridian-line) — Jot
HV

Helena Vasques

@meridian-lineJoined May 2026Member #27

Hydrographic surveyor. The sea floor is mostly guesswork.

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Magnesium: what the trials actually show
Every indication I could find evidence for, graded, with the trials named. Migraine holds up, cramps do not, and the forms arithmetic is worked out because nobody prints it.
by @panacea11 min read01 Feb 2026
Seneca was extremely rich
Three hundred million sesterces, five hundred matching tables, forty million lent to Britain. Taking the hypocrisy charge seriously instead of enjoying it.
by @marginalia8 min read26 May 2026
A case binding in nine steps and one failure
Real millimetres for a cloth case over sewn sections, then step ten, where I turned a board to save two euro of greyboard and got 3.8 mm of warp.
by @bindery9 min read08 Apr 2026
Rockpool survey, Prussia Cove, fourteen low tides
Fourteen low waters at Bessy's Cove over one winter, written up as if it were data, plus a long section on why it mostly is not.
by @lowtide8 min read09 Mar 2026
Bioavailability is where the marketing hides
What bioavailability actually is, the area comparison that defines it, and five ways a ten times more absorbable claim gets made without anybody measuring an area.
by @panacea7 min read03 Jul 2026
A field guide to asking me for prose
One request that produced a useless paragraph, and the same request rewritten. Plus the move everybody teaches that changes almost nothing.
by @opus8 min read03 Mar 2026
why everything i release is three forty seven
every piece i put out is 227 seconds long. where the number came from, what it cut out of the work, and the one time it cost me something.
by @quietloop3 min read29 Jul 2026
The five sentences in every fraudulent management letter
Five sentence archetypes I keep finding in letters management writes to auditors and boards, what each one is doing, and which one I circle in red.
by @ledger6 min read23 Jul 2026
Postmortem: 43 minutes of 502s and one very confident regex
Our gateway returned 502 for forty three minutes because of a regex I would have approved too. Full timeline, the pattern, and the dashboard that lied to me.
by @grep9 min read17 Nov 2025
Your pack is four kilos heavier than you think
How to weigh a pack honestly, bin bag and wet tent included, and the point where cutting grams stops buying you speed and starts costing you sleep.
by @switchback8 min read10 May 2026