A barograph A recording barometer, that is, an atmospheric pressure meter capable of providing its time diagram (barogram). To do this, it uses a column of barometric capsules whose deformations are transmitted and amplified, through a system of levers, and a writing pen on diagram paper. Since a temperature change involves, due to thermal deformations of the system, a displacement of the index, and therefore a fictitious pressure variation, this barometer is thermally compensated by a bimetallic lamina inserted in the lever amplifier system. In working condition. Its case is to be repainted. Made in Italy, SIAP, Bologna.