[lynguist]

> ‘Spirit’ thermometers, made using brandy and other liquors, were in common use in the early days of thermometry. They were even considered as a potential standard fluid for thermometers. It wasn’t until the careful work of Swiss physicist Jean-André De Luc in the 18th century that physicists realized that alcohol thermometers are highly nonlinear and highly variable depending on concentration, which is in turn hard to measure.

During Deluc's time in the 18th century Geneva was not part of Switzerland, thus Deluc was Genevan/Genevese, not Swiss.

Geneva was an independent city republic with centuries of history until Napoleon (1798) when it was incorporated into France. After Napoleon during the Vienna Congress of 1815 - in the 19th century - Geneva joined Switzerland.

Other people from Geneva of the same time period include Rodolphe Töpffer, the first comic book artist, and Jean-Jacques Rousseau.

We don't use today's political borders for historic figures.