Immagini

DESCRIPTION

Exhibit 649 is a barometer calibrated directly in meteorological previsions. It is based on a stylus floating on a U-shaped mercury column exposed to the atmospheric pressure. The stylus is connected directly to the direct reading dial by a pulley which supports a balancing weight on the opposite side (now missing). The instrument is mounted on a decorated wood support which covers the mercury column with a small door and allows the instrument to hang vertically. Above the dial there is space for a thermometer which covers the temperature range from 36° to 68° C. The meteorological previsions are: storm, rain, variable, fine, and very dry. They are read through a glass window above which there is a manual dial for reference changes

ISCRIZIONI

1. Sul Barometro:
   Carcano, Rue Nve. St. Denis no.5 Paris
2. Sul Termometro:
   In alto:Thermomètre
   In basso a sinistra: Réaumur
   In basso a destra: centigrade
   In corrispondenza dello zero: GLACE
   In corrispondenza di 34 °C: Bain
   In corrispondenza di -7 °C: Riviere glacee
   In corrispondenza di 14 °C: Temp.re

BIBLIOGRAPHY

• [1] URL [ http://museo.liceofoscarini.it/virtuale/barometri.html ]
• [2] Mara Miniati (CUR.), " Museo di storia della scienza, Firenze. catalogo", 04/1991, Giunti Editore

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