samuel gessner's Avatar

samuel gessner

@sgessner.bsky.social

29 Followers  |  17 Following  |  10 Posts  |  Joined: 21.01.2025  |  1.7893

Latest posts by sgessner.bsky.social on Bluesky

Thank you Veronica for presenting us these fascinating vistas from the amazing Tartaglia. Avery relevant author in the context— read by so many all over Europe (including Pedro Nunes, mathematician and royal cosmographer in Portugal).

23.05.2025 21:22 — 👍 1    🔁 0    💬 0    📌 0
Post image

🎉 Today's the first day of our "Euclid's Elements and Practical Mathematics" workshop in Wuppertal 📖 I'll try to present the speakers, beginning with Philip Beeley ⤵️

22.05.2025 12:29 — 👍 12    🔁 2    💬 3    📌 1

Beautiful adventure, many thanks for being persistent and doing much of the heavy lifting! I learned so much from both of you.

22.05.2025 07:59 — 👍 1    🔁 0    💬 1    📌 0

Ärgert mich auch. Aber für die NZZ leider nicht überraschend… da kommen sehr regelmässig Stimmen zu Wort, mit Wasser auf die falschen Mühlen. Zum Glück sind viele Leser schlau genug, solche Artikel mit mit Vorsicht zu geniessen.

27.04.2025 21:06 — 👍 0    🔁 0    💬 0    📌 0

Yes. The regulating mechanism (verge and foliot) was replaced in most 15th and century clocks. It’s a tragedy for the clock historians as so much of the historical evidence has been destroyed through the ‘modern improvement’ by a pendulum.
I remember this happened to the planetary clocks…

21.04.2025 15:15 — 👍 3    🔁 0    💬 2    📌 0

There are a few…

19.04.2025 14:52 — 👍 0    🔁 0    💬 0    📌 0
Salle Cassini, with the seventeenth-century brass meridian line on the floor…

Salle Cassini, with the seventeenth-century brass meridian line on the floor…

Already looking forward to the 2026 edition!

19.04.2025 14:11 — 👍 4    🔁 0    💬 1    📌 0
Preview
Conference 2025 A long history of diagrammatization in the astral sciences Third International EIDA Conference Org. Matthieu Husson, Samuel Gessner, Divna Manolova, Stefan Zieme, Florence Somer   Practical aspects  O...

It’s a snapshot of the in-person participants after the final session.

Full programme:

eida.hypotheses.org/conference-2...

19.04.2025 14:07 — 👍 0    🔁 0    💬 0    📌 0
Post image

Even more so, to help shape this shared journey: creating spaces for conversations between people and between diagrams from historical manuscripts and prints—in Chinese, Arabic, Persian, Hebrew, Greek, Latin, and various vernacular traditions.

19.04.2025 13:59 — 👍 4    🔁 0    💬 0    📌 0
Post image

Just wrapped up the 2025 EIDA conference—once again, an incredibly productive and inspiring gathering. Held in the historic building of the Observatoire de Paris, it was a true pleasure to listen to and exchange ideas with so many sharp and generous scholars—both in person and online.

19.04.2025 13:49 — 👍 2    🔁 0    💬 0    📌 0
Login • Instagram Welcome back to Instagram. Sign in to check out what your friends, family & interests have been capturing & sharing around the world.

www.instagram.com/p/DHyEV6MNlC...

02.04.2025 12:30 — 👍 0    🔁 0    💬 0    📌 0
Post image

From June 2 to June 6, 2025, the Training Week: A Global History of Astronomy on Primary Sources: New Approaches, New Digital Tools will take place in Paris.

Limited number of scholarships; deadline April 18, 2025.

For more details: eida.hypotheses.org/seminars-2/t...

10.03.2025 10:16 — 👍 8    🔁 3    💬 0    📌 1

Si vous aimez plonger dans le monde merveilleux des astrolabes, cadrans solaires et livres d’astronomie anciens, suivez ce fil de toute urgence. 👇
Thanks @stephenaj.bsky.social for sharing these treasures!
#histsci #historyofastronomy 🔭

20.01.2025 10:50 — 👍 4    🔁 1    💬 0    📌 0

@sgessner is following 17 prominent accounts