Vlll. 
PREFACE. 
pleasure and thankfulness, to the several authors of hiographical 
notices of members of the Society : in eacli instance they are 
acknowledged in the context. 
The compilation of the list of officers and members has been 
imdertakeii by my son Percy ; the Index to the volume is due also to 
him ; at my suggestion he cheerfully gave up a holiday in order to 
prepare it. 
