"If dry hydrogen is passed over a weighed quantity of copper oxide which is heated, steam and copper result. The water can be collected and weighed in a tube containing a drying agent. The weight lost by copper oxide is the weight of the oxygen. the difference between the weight of the oxygen and the weight of the water formed is the weight of the hydrogen." -Brownlee 1907
Brownlee, Raymond B., Fuller, Robert W., Hancock, William J., Sohon, Michael D., Whitsit, Jesee E. First Principles of Chemistry (Boston: Allyn and Bacon, 1907) 35
