<http://webisa.webdatacommons.org/prov/480858792>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/98452407> .
<http://webisa.webdatacommons.org/98452407>	<http://www.w3.org/ns/prov#value>	"Chemistry teaches that the thousands of forms of matter upon the earth, almost infinite in variety, can be resolved into eighty substances, unalterable by chemical processes and possessing definite spectra." .
<http://webisa.webdatacommons.org/98452407>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/98452407>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wikisource.org> .