Primary sourceDocument10 December 1709

Supplication of Fahrenheit's guardians to Danzig council

Joachim Braun · 10 December 1709

An official 1709 petition from the guardians of Fahrenheit's late family about a debt he had collected, a rare contemporary document mentioning him.

A contemporary legal petition naming Fahrenheit, documenting his role collecting a debt as a young man after his parents' death.

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Handwritten page in brown ink on aged, yellowed paper, with a decorative opening flourish and a page number 543 in the upper right corner. The dense cursive text is in an early modern German-style hand, with some lines underlined. — Petition of the guardians of the Fahrenheit estate to the Danzig city council, 10 December 1709.

About this source

What it is

This is a handwritten petition submitted to the Danzig city council on 10 December 1709 by Joachim Braun, with Brunon Plander, Beniamin Hedding, and Daniel Nützmann, the guardians of the Fahrenheit family estate. It concerns a debt of 1500 florins that Daniel Fahrenheit had been asked to help collect.

Why it matters

This document is a rare piece of contemporary evidence about young Fahrenheit's life, showing he was involved in debt collection for his late parents' business associates after being orphaned. It reflects the practical, commercial world he grew up in as a merchant's son in Danzig, before he turned to science.

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What does this document suggest about Fahrenheit's responsibilities as a young man?
Why might guardians have needed to petition a city council over a financial dispute?
What can official records like this tell us that personal letters or scientific papers cannot?

This document is part of the curated material that grounds the AI version of Daniel Fahrenheit on Humy.ai — when students ask about related events, the AI can quote it and cite it.

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Daniel Gabriel Fahrenheit

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