the present day, and con- is unknown. The fact that the piston of the syringe structed substantially the same as those made by Guericke. could not be withdrawn without the cylinder becomiae! They consist of hollow brass hemispheres, as shown in Fig. 2. The two hemispheres were pressed together and… … which the learned burgomaster did not think. When the Gi be $F _ =: diplomatic missions allowed him, to study and experiment hemispheres are joined together, and the vacuum within as Fig. 1.—OTTO VON GUERICKE'S ORIGINAL AIR PUMP, | on scientific matters. is attention being first called to the…
Internet Archive · Public domain (published before 1931). Free to use for anything.
