VI. 
sections also has been altered, with a view of bringing into greater 
prominence the queries which present the least difficulty to those 
whose special knowledge may be slight. 
The thanks of the editors are due to those friends who have 
contributed the new sections, to others who have kindly given help 
in revising the old, and not least to the writers of the original work, 
who have borne with calmness the process of editing. 
