Stephen Hales ( 1677 - 1761 ) was a painter. Stephen Hales s works have been put up for auction numerous times, with realized prices varying from 188.17 USD for An Account of some Statical Experiments on the Sap in Vegetables in 2005 to 308 USD for Portrait of a Bare-chested Man in Suspenders in 2013 , based on the size and medium of the artwork.