Short-term disability insurance, which is most often purchased as part of a group at work, can be paid by either the employer or the employee. Group short-term disability insurance policies are guaranteed issue, meaning you do not have to take a medical exam to buy coverage.
In 1650, Otto von Guericke invented the air pump, used to create a partial vacuum. Using hollow copper spheres and an air pump of his own construction, Guericke demonstrated that a partial vacuum could be created by pumping the air out of the sphere.
Otto Von Guericke life and biography. Otto Von Guericke biography. Otto von Guericke is a German physicist, engineer and natural philosopher who built the first machine to create an electric spark. He used this electrical generator for many experiments with electricity, he was the first man to view electroluminescence.