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The evacuating of a bell jar by means of a portable air pump in order to examine the effect on the creatures imprisoned in it
ARP23A15_324

The evacuating of a bell jar by means of a portabl...

Experiment to ascertain the effects of static electricity on plants and animals
ARP07112_009782P

Experiment to ascertain the effects of static elec...

Glass globe static electric machine
ARP07112_009787P

Glass globe static electric machine