Penicillin nontoxic in humans by first performing toxicity tests in animals and then on humans. His subsequent experiments on penicillin's response to heat and pH allowed Fleming to increase the stability of the compound. The one test that modern scientists would find missing from his work was the test of penicillin on an infected animal, the results of which would likely have sparked great interest in penicillin and sped its development by almost a decade. The importance of his work has been recognized by the placement of an International Historic Chemical Landmark at the Alexander Fleming Laboratory Museum in London on
Valentine, Texas Texas. In July 2011 the USPS announced that the post office may close. Valentine is home to, as one politician puts it, "the greatest ever West Texas Valentine's Day celebration." Hosted by the Big Bend Brewing Company of Alpine, Texas, as many as 1,000 people invade Valentine on Valentine's Day from points as close as Valentine itself, Marfa, and Alpine, to far away places such as Chicago and Cleveland. In 2014, the west Texas brewery served free cups of beer while Gary P. Nunn played live on stage, under the moonlit night and stars. On August 16, 1931, a magnitude