“…In this respect, there are connections that one could draw between Herschel's work and contemporary literature on exploratory experimentation. See, e.g., Burian (1997Burian ( , 2007, Steinle (1997Steinle ( , 2002aSteinle ( , 2002b, Franklin (2005), Elliott (2007), O'Malley (2007, 2011), Waters (2007, O'Malley et al (2009O'Malley et al ( , 2010. copper discs but also with discs of zinc, brass, and lead.…”