. "President of:" . . . . . . . "Archibald Barr" . . . . . . "*Royal Philosophical Society" . . . . . "1855" . . . . . . . . "Archibald Barr" . . . . . "1931" . . . . . "1931-08-05" . . . "*Institution of Engineers and Shipbuilders in Scotland" . . . . . . . . . . "*Scottish Aeronautical Society" . . "*Optical Society, London" . . . . . "1855-11-18" . . .