TV sicientist and historian Doctor Adam Hart-Davis helped celebrate the centenary of the Jospeh Priestley statue.
The writer, scientist and photographer, was in Birstall to celebrate one hundred years since the unveiling of the statue by sculptor Miss Frances Taplin Darlington in the town centre.
Joseph Priestley lived from 1733 until 1804 and discovered oxygen in 1774.
The scientist eventually resetled in America.
He inspired Dr Hart-Davis’s series on local heroes when he discovered Priestley’s birthplace was at Fieldhead Farm in Birstall.
An inscribed memorial carved from local stone was presented by the Priestley Society and the Rotary Club of Birstall Luddites to celebrate Birstall as the birthplace of Priestley. A floral tribute was presented by the sculptor’s great-great niece Louise Marchall.