![](brmedchirj272299-0014){#sp1 .95}

![](brmedchirj272299-0015){#sp2 .96}

![](brmedchirj272299-0016){#sp3 .97}

![](brmedchirj272299-0017){#sp4 .98}

![](brmedchirj272299-0018){#sp5 .99}

[^1]: A paper read before the Bristol Medico-Chirurgical Society on Wednesday, 9th March, 1949.
