Objekt 7
Model of a pyrometer (thermal expansion meter)
Description
The pyrometer shows the expansion of metal under the influence of heat by means of a simple, easily visible transmission mechanism, here using the example of a bar of lead.
Object description
probably France, around 1800
Wood, brass, iron, lead rod
Inscription: La premiere des petites Divisions répond à 4000 / d'un pouce d' alongement de la barre de métal
Purchase around 1819 by Prof. Christoph Bernoulli
Deposit Institute of Physics of the University of Basel, Phys. 32.
Inv. 1986.405.