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
Uncle Valentine Uncle Valentine Uncle Valentine is a short story by Willa Cather. It was first published in "Woman's Home Companion" in February 1925. A music teacher is giving a lesson to an American girl, who says she has been practising songs by Valentine Ramsay. The teacher says another lady in the room can tell her more about him. Marjorie explains Valentine was her uncle. One day, her Aunt Charlotte is getting ready for her brother to come back after leaving for Europe subsequent to leaving his wife. She trains the girls to sing for Valentine's arrival. When he first gets there,