Tweeluik. Plaasteren studie voor de stenen reliëfs voor het ministerie van Openbare Werken in Brussel.

An ammeter can be used to measure electrical current.

A voltmeter can be used to measure electrical voltages.

A voltmeter can be used to measure electrical voltages.

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

Hydrostatic Mohr and Westphal balance. The Mohr balance determines the specific gravity of liquids.

Hydrostatic Mohr and Westphal balance. The Mohr balance determines the specific gravity of liquids.

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a metal frame and a sliding glass ...

The weighing scales are on a wooden box. It has two shallow scales.

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

Barometer with mercury on a wooden board. The barometer was manufactured at KU Leuven.

Barometer with mercury on a wooden board. The operation of the barometer is explained by three ...