924 SIR JOHN FRANCIS DAVIS ON TEA. ([Cuar. XI. 
existing in a small proportion to the leaf!; and the Chinese 
seemed quite conscious of the real character of the occupation 
in which they were engaged ; for, on attempting to enter several 
other places where the same process was going on, the doors 
were speedily closed upon the party. Indeed, had it not been 
for the influence of the Hongist who conducted them, there 
' would have been little chance of their seeing as much as they 
did.” 
' The turmeric and gypsum are perfectly innocuous ; but 
the prussian blue, being a combination of prussic acid with iron, 
