In the meantime, on August 1, 1774, an experiment conducted by the British clergyman Joseph Priestley focused sunlight on mercuric oxide (HgO) inside a glass tube, which liberated a gas he named "dephlogisticated air". He noted that candles burned brighter in the gas and that a mouse was more active and lived longer while breathing it. After breathing the gas himself, he wrote: "The feeling of it to my lungs was not sensibly different from that of common air, but I fancied that my breast felt peculiarly light and easy for some time afterwards." Priestley published his findings in 1775 in a paper titled "An Account of Further Discoveries in Air" which was included in the second volume of his book titled Experiments and Observations on Different Kinds of Air. Because he published his findings first, Priestley is usually given priority in the discovery.
"An Account of Further Discoveries in Air" was published by who in 1775? What was the occupation of Joseph Priestley? The symbol for mercuric oxide is? By sunlight, what compound did  Priestley concentrate on to make the gas he called "dephlogisticated air"? What chemical did Priestley use in his experiments on oxygen? What did Priestley name the gas his experiment produced? In what year did Priestley publish the findings of his experiments? Why is Priestley usually given credit for being first to discover oxygen? What effect did breathing Priestley's discovered gas have on the experiment's mouse?