Sometimes... when you cry... no one sees your tears .
Sometimes... when you are worried... no one sees your pain.
Sometimes... when you are happy... no one sees your smile.
But fart just one time...
Julian W. HillDied 28 Jan 1996 at age 91 (born 4 Sep 1904).Julian Werner Hill was an American chemist was a U.S. research chemist who discovered cold drawing, a technique of strengthening polymer fibers by stretching. Julian Hill and Wallace Carothers had been building long polymer chains by a reaction of a carboxylic acid with an alcohol to give an ester in a device called a molecular still. While removing a sample of the resultant product from the still, Hill observed that the molten polymer could be drawn into fibers. He then made an important and unexpected discovery - that after being cooled, these pliable filaments could be stretched or "cold drawn" to form very strong fibers. Further tests on the sample showed that it had a molecular weight of over 12,000, far higher than any previous polymer. |
