Occurrence of Attributes in Original Text

The text related to the cultural heritage 'The Jantar Mantar, Jaipur' has mentioned 'Lead' in the following places:
Occurrence Sentence Text Source
Ram Singh (r. 1835-1880) completed restoring the Jantar Mantar in 1876, and even made some of the instruments more durable by inserting lead into the instruments' lines and using stone to restore some of the plaster instruments.