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.
Henry Bessemer invented a steel production process that led to the Industrial Revolution. His invention allowed for the large-scale production of steel while taking out the... Henry Bessemer invented a steel production process that led to the Industrial Revolution. His invention allowed for the large-scale production of steel while taking out the impurities. Bessemer had other inventions including a group of steam-powered machines. He also invented a sugar cane crushing machine.