Made in France (Lens: Japan)
Airpump for demonstarion of the effects of the vacuum.
Used at the laboratory of the First Gymansium of Nauplion, one of the first secondary schools of the Greek State.
It is used to amplify small variations of length.
The anemometer measures the wheel revolutions transforming them in meters. In order to measure the wind speed the observer needs a chronometer (distance/time).
Optical apparatus probably made by Duboscq.
Determining the volume of vapour yielded by a given weight of liquid.