French physicist Jean-Pierre Christin published the design of a mercury thermometer using the centigrade scale with 0 representing the melting point of water and 100 its boiling point.
Available at : Annales des sciences physiques et naturelles, d'agriculture et d'industrie
By Société d'agriculture, sciences et industrie de Lyon. via @googlebooks
Historical note:
1742 Anders Celsius invented the Celsius temperature scale. In its original form the scale had 0 degrees for the boiling point of water and 100 degrees for its freezing point.
1743 The scale was changed by Jean Pierre Christin so that 0 degrees is the freezing point of water and 100 degrees is its boiling point.
Anders Celsius published his research at Abhandlungen über thermometrie, von Fahrenheit, Réaumur, Celsius, (1724, 1730-1733, 1742)
Hrsg. von A.J. von Oettingen.
English self-taught mathematician and physicist Oliver Heaviside was born #OTD in 1850.
He invented a new technique for solving differential equations, independently developed vector calculus, and rewrote Maxwell's equations in the form commonly used today. He significantly shaped the way Maxwell's equations are understood and applied in the decades following Maxwell's death. His practical experience in telegraphy provided a foundation for his later theoretical work.
@weekend_editor He made a significant contribution by providing a new interpretation of Maxwell's equations. And probably his mental issues were due to the intense dedication to his work. We should look at his legacy instead...
@gutenberg_org its true that some use the equation used by Maxwell but they are a rehash of a 20 year early set of Fourier based derivation by another Scottish mathematician as stated by Faraday .
My PhD thesis has been published!
If you're interested in how to manipulate atoms into their coldest possible state using lasers, and why it's interesting to drop them in a 10m vacuum tower, this is for you! Also, fun with "painting" arbitrary shapes with laser beams! #physics#AtomInterferometry#Quantum#QuantumSensing https://doi.org/10.15488/17346
This is quite interesting. (no... really!) I recently persuaded a colleague to take my pet Geiger counter from Dunedin to Apia via Auckland. The latitude dependency of the radiation exposure is fascinating! #radiation#NewZealand#physics
@_thegeoff The x axis is minutes but the time between flights has been cut out for the charts (Geiger counter turned on just before each flight and off after flight landed).