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.
1876 - Nikolaus August Otto invented and later patented a successful four-stroke engine, known as the Otto cycle. 1876 - The first successful two-stroke engine was invented by Sir Dougald Clerk. 1883 - French engineer, Edouard Delamare-Debouteville, built a single-cylinder four-stroke engine that ran on stove gas.