44 Y. KIKUCHI 



Speclftc gravity = 2*761 as determined by Thoulet's solution. Before 

 the blowpipe, somewhat difficult to fuse. Very fine splinters which 

 can sometimes be obtained from the fissured variety within the lava, 

 fuse comparatively ensily to a clear glass, glowing intensely, and im- 

 parting a reddish -yellow tint to the flame. In hydrochloric acid, the 

 powder is entirely decomposed, leaving gelatinous silica. 



