Gustave Adolphe Hirn
- Category : 1815-births
- Type : GE
- Profile : 3/6 - Martyr / Role Model
- Definition : Split - Small (9,57,60)
- Incarnation Cross : RAX Contagion 3
French physicist, astronomer. mathematician and engineer who made important measurements of the mechanical equivalent of heat and contributions to the early development of thermodynamics. He further applied his science in the practical development of steam engines.
Hirn invented the pandynanometer in 1880 and published a theory of the origin and chemical composition of Saturn's rings, exchanging correspondence with Urbain Jean Joseph Leverrier.
He died in Logelbach-près-Colmar on 14 January 1890, aged 74.