<http://webisa.webdatacommons.org/436820670>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/436820670>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/192252800>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/436820670> .
<http://webisa.webdatacommons.org/436820670>	<http://www.w3.org/ns/prov#value>	"They are prone to misalignment and relative motion of their components, especially in comparison with the compact and simple apparatus taught herein." .