Ninth Supplement to Dana’s Mineralogy. 355 
mineral remained in doubt.” But how does the ease stand—and 
analyses, and besides showed by direct experiment that the min- 
eral contains no alkalies (this Journal, [2], xvi, 365). No allu- 
sion is made to this latter fact in the work before us, but from the 
Many years prec 
pacing it by the name Hydrargillite. It matters not what 
Hermann analyzed, it is an indisputable fact that Torrey’s Gibbs- 
ite is hydrate of alumina, and furthermore such a change of 
names as our author proposes, is against all usage, and followed 
out would cause endless confusion in nomenclature. We hay 
