306 Scientific Intelligence. 
4, On Organic Uliramarines.—DeEForcranpd has succeeded in 
roducing an ultramarine containing ethyl. Though Unger first 
succeeded in replacing half of the sodium in ultramarine by silver, 
Heumann first produced an ultramarine in which this replacement 
was complete, This yellow silver-ultramarine served as the start- 
ing point in the new researches. When heated, dry, with a 
metallic or an organic chloride, silver chloride and a new ultra- 
marine result. Silver ultramarine was prepared by heating in 
sealed tubes for 15 to 16 hours, four or five grams of blue ultra- 
the inverse one; or by heating the two without water to a hig 
he i 
formation is a maximum. e potassium and rubidium ultrama- 
clear gray pow ‘ 
ethyl sulphide. If, however, this powder be intimately mix 
with sodium chloride before heating it, only a trifling evolution 
mix 
zene nhuc. 1 Von Ricutr h ‘ a 4 direc’ 
synthesis of the benz EE has sought for and discovere 
benzene ring which strongly confirms the hypot 
