Unequal refrangibility of two differently coloured lights mb-artistname Ian Grieve His left hand rests on

His left hand rests on an open book with other volumes bookended on the table

Plate 21 from volume I of The natural history of Carolina

and acted as president of the Royal Geographical Society in 1839 and 1840

Three-quarter length studio portrait of William Benjamin Carpenter

Unequal refrangibility of two differently coloured lights mb-artistname Ian Grieve His left hand rests onExperiment to demonstrate the unequal refrangibility of two differently coloured lights, an illustration of Newton's first proposition, "Lights which differ in colour differ in refrangibility". From Contributions to solar physics, by J Norman Lockyer (London, 1874). Original: engraving. 1874