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.
Otto von Guericke: Father of Vacuums. Otto von Guericke was a German scientist born in the town of Magdeburg, Germany. He is best remembered for founding the physics of vacuums. In 1650, Otto invented a vacuum pump that was designed to pull air out of whatever vessel to which it was connected. It contained a piston and an air-gun cylinder with one-way flap valves.
Guericke was able to prove that the sparks generated were electrical in nature. The first practical use of static electricity was the âelectric pistol,â which was invented by Alessandro Volta (1745-1827). An electrical wire was placed in a jar filled with methane gas.he discovery was known as the Baghdad or Parthian battery (see Figure 1) and was believed to be 2000 years old, dating back to the Parthian period [The Parthian empire existed in what is now Iran from 247 BC-224 AD. â Ed .]. The battery consisted of a clay jar filled with vinegar.