Primary sourceDocument

Signature of Daniel Gabriel Fahrenheit

Daniel Gabriel Fahrenheit

Fahrenheit's personal signature, used to authenticate documents associated with him.

This is Fahrenheit's personal autograph, used to verify documents connected to him.

Ask Daniel Fahrenheit about this source View the original

Black handwritten signature on a white background reading D. G. Fahrenheit in flowing cursive script, with large looping initial letters and a long underline-like stroke. — Signature of Daniel Gabriel Fahrenheit.

About this source

What it is

This image shows the handwritten signature of Daniel Gabriel Fahrenheit, reading "D. G. Fahrenheit" in cursive script.

Why it matters

A signature is one of the most direct physical traces a historical figure leaves behind. It helps confirm that documents, letters or papers attributed to Fahrenheit actually came from him.

Look closer

What can the style of handwriting in a signature suggest about a person or their era?
Why do historians use signatures to verify authorship of old documents?
What does a signature alone fail to tell us about the person who wrote it?

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.

More Daniel Fahrenheit sources

Meet the AI Daniel Fahrenheit →

Scanned page 1 of a 1724 journal article titled 'Experimenta circa gradum caloris liquorum nonnullorum ebullientium instituta' by Daniel Gabriel Fahrenheit, printed in Latin with a page number '(1)' at top and 'Vol. XXXIII' footer.

Document

Primary source

Experimenta circa gradum caloris liquorum nonnullorum ebullientium instituta

Daniel Gabriel Fahrenheit · 1724

Handwritten cursive signature in ink on a white background: large looping initials D and G, with the surname written below as 'renheit' and a flourished 'Fa' to the right, forming Fahrenheit's signature.

Document

Primary source

Fahrenheit's Last Will Signature

Daniel Gabriel Fahrenheit · 11 September 1736

Engraved plate titled 'Philosoph. Transact. N° 385' with eight numbered figures (I to VIII) of glass barometer and thermometer apparatus, including tubes, bulbs, scales, and stands, drawn in black and white.

Document

Primary source

Barometri novi descriptio

Daniel Gabriel Fahrenheit · 1724

Printed page numbered 114 from a journal. Top text describes dog experiments with tinctures. Below a rule, a section heading reads 'VI. Materiarum quarundam gravitates Specificae' by D. G. Fahrenheit, followed by a list of metals and materials with specific gravity values.

Document

Primary source

Materiarum quarundam gravitates specificae

Daniel Gabriel Fahrenheit · 1724

A bronze memorial plaque on a white wall with Dutch text reading 'In de Kloosterkerk werd begraven Daniel Gabriel Fahrenheit', with birth and death details and a relief of a thermometer in the center.

Artifact

Secondary source

Grave of Daniel Gabriel Fahrenheit

Ready when you are

Start chatting with Daniel Fahrenheit now.

20 messages free · No credit card · Available in 50+ languages.

Trial Humy for free Get a quote for institutions