Although Goodyear welted shoes are synonymous with English made footwear, the name and machinery used was in fact the invention of an American by the name of Charles Goodyear Jr, son of the great inventor Charles Goodyear, who invented vulcanised rubber.
What does AM and PM stand for? AMâalso spelled âamâ or âa.m.ââis the abbreviation for ante meridiem, a Latin phrase meaning âbefore noon.â PMâalso spelled âpmâ or âp.m.ââis the abbreviation for post meridiem, which simply means âafter noon.â Noon, of course, refers to the middle of the day.
What is PM, and how does it get into the air? Size comparisons for PM particles. PM stands for particulate matter (also called particle pollution): the term for a mixture of solid particles and liquid droplets found in the air. Some particles, such as dust, dirt, soot, or smoke, are large or dark enough to be seen with the naked eye.