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) Second Battle of Heligoland Bight. An attempt by "Valentine" and the destroyer to carry out a torpedo attack on German cruisers proved unsuccessful. In 1919, "Valentine" was deployed to the Baltic Sea as part of the British intervention in the Russian Civil War, which helped to ensure the independence of the Baltic states. Post-war, "Valentine" formed part of the 2nd Destroyer Flotilla, first as part of the Atlantic Fleet and later as part of the Mediterranean Fleet. In the 1920s, "Valentine"s twin torpedo tubes were replaced by triple tubes, giving a torpedo armament of six 21 inch torpedoes, and the