| 
      At
      the EPS Meeting on Wednesday 5 January 1881, 
       James
      Howie jun., Vice President took the chair for an open discussion on 
      What
      is the Best Mode of Toning Transparencies?    
      Other
      Edinburgh professional photographers who contributed to the evening's
      discussions were  Frank Pelham Moffat, 
      
      Thomas Muir, and 
       William
      Neilson. 
      The
      discussion was opened by Mr Mathieson, who had clearly been experimenting
      with toning.  British Journal of Photography reported: 
      Mr
      Mathieson opened the discussion by stating that he had tried toning
      his transparencies both with gold and platinum, but he had not succeeded
      in getting tones to his entire satisfaction. 
      [He] 
      remarked that he found transparencies that had been toned with
      permanganate were not reliable, as they soon lost their colour; the plates
      with which he preferred making transparencies were chloro-bromide. ... 
      Mr
      Mathieson next showed a series of transparencies in the lantern.  The
      subjects consisted of various kinds: 
       -  Landscapes, in some of which were introduced remarkably fine portraits of
      cattle, sheep &c. 
      -   Seascapes , in which instantaneous views of vessels were seen; also some
      very characteristic pictures of fishermen and fisherwomen at their daily
      occupations. |