However, some manufacturers have recently made the decision to no longer include propylene glycol in their products. Do not be alarmed by the term antifreeze or by the chemical, propylene glycol. It is safe at the low concentrations when used in personal care products. This is possibly due to misinformation and propaganda circulated on the Internet in the interest of marketing natural products.
In 1927, the first iron lung was installed at Bellevue hospital in New York City. The first patients of the iron lung were polio patients with paralysis of the breathing muscles. Later John Emerson simplified Philip Drinkerâs invention and reduced the manufacturing costs. An iron lung has âport holesâ along both sides that allow access to the patient for medical needs and personal care. When an arm is inserted through these âport holesâ a rubber gasket provides an air tight seal. The bed of the iron lung can also slide forward to allow complete access to the patient. An iron lung, or tank respirator, is a very gentle means of providing breathing assistance. Because of its bulk the iron lung has been largely replaced with units that are smaller and portable.
The Story: Inventor of the printing press, Henne G nsfleisch zur Laden, commonly called Johannes Gutenberg, was born about 1400 and died in 1468 at Mainz, Germany. Gutenberg was the son of Friele (Friedrich) G nsfleisch and Else Wyrich.041 Bi Sheng in China invented movable clay type 1400 Johannes Gutenberg born in Mainz, Germany 1423 Europeans use xylography (art of engraving on wood, block printing) to produce books.