Manometer at I. P. Pavlov's laboratory
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Manometer at I. P. Pavlov's laboratory. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Manometer at I. P. Pavlov's laboratory. Wellcome Collection. Source: Wellcome Collection.