"Before his Lordship published his judgment on the rival claims of Cavendish and Watt in the ' for 1848, I had many conversations with him... Chemistry was a science in which he had always taken great interest... With his estimate of the relative merits of Cavendish and Watt I could not concur, and he listened to my earnest defence... with all the frank courtesy and love of fair dealing which so eminently characterized him."