Assertion: bunsen burner | /r/HasProperty | three related laboratory tools
Facets:
value: closely
type: DEGREE
Source sentences:
text: Bunsen burners, Meker burners and Tirrill burners are three closely related laboratory tools that derive from a design popularized in the 1850s by German chemist Robert Bunsen and first built for him by Peter Desaga, a scientific instrument maker at Bunsen's university.