"The results obtained in a variety of conditions when it (tea tree) was first tried were most encouraging, a striking feature being that it dissolved pus and left the surface of infected wounds clean so that its germicidal action became more effective without any apparent damage to the tissues.  This was something new, as most efficient germicides destroy tissue as well as bacteria...."

Reference:  E.M. Humphery, "A new Australian germicide",  Med. J. Australia,1930 1: 417-418.