8mm projection device

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Made in France (Lens: Japan)

Airpump

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Airpump for demonstarion of the effects of the vacuum.

Airpump

AER09.jpg

Used at the laboratory of the First Gymansium of Nauplion, one of the first secondary schools of the Greek State.

Amplification circle after Muller

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It is used to amplify small variations of length.

Anemometer

Anemometer Richard

The anemometer measures the wheel revolutions transforming them in meters. In order to measure the wind speed the observer needs a chronometer (distance/time).

Richard catalogue, 1900, Exposition universelle de Paris

Apparatus after Duboscq

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Optical apparatus probably made by Duboscq.

Apparatus after Hoffmann

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Determining the volume of vapour yielded by a given weight of liquid.

Copyright National Hellenic Research Foundation - National Observatory of Athens