the copper globe previously used, snfticient to separate it from the upper one. Guericke at- purpose he used a ])ump, provided with the necessary stop-1 This machine being very exact and powerful, a prolonged tached one hemisphere to a hook fastened in the body of a cocks, reaching to the bottom of… … um in the cylinder. The piston duced Otto von Guericke to leave Eig. 2.-ATM0SPHEB1C PRESSURE EXHIBITED BY THE HEMISPHERES. was consequently forcibly drawn Magdeburg and bring his appa- into the cylinder, while the men ratus to his palace at 'Wiirzburg. attached to the ropes were sud- At tlie latter…
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