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
HMS Valentine (L69) transferring to Dover Command in May. "Valentine" was one of four destroyers deployed to the Scheldt estuary to support demolition operations and the evacuation of shipping from Antwerp. While providing AA cover to Allied troops, "Valentine" was damaged by dive bombers on 15 May 1940, and beached near Terneuzen. 31 of "Valentine"s crew were killed, with a further 21 injured. "Valentine" was partly salvaged and broken up in 1953, but part of the ship's hull remains and is sometimes visible at low tide. HMS Valentine (L69) HMS "Valentine" was a , built in 1917 for the Royal Navy. She fought