«At 
acid a 
Which when mixed with air exploded on gentle heating. Chemists will 
wait the final results of this important investigation with especial interest. 
—Ann. der Chemie und Pharmacie, civ, 94, 
5. New Researches on Boron.—Wéu.er and Devitte have communi- 
th 60 grams of 
Sodium and project the mixture into.a red-hot cast-iron crucible, Th 
i 
"on rod, and the fused mass poured into water acidulated with chlorhy- 
dric acid and contained in a deep vessel. On filtering, the boron remains 
on the filter and is to be washed first with acidulated and then with pure 
Water. The boron may now be dried upon a brick at ordinary tempera- 
ture, as it might otherwise take fire and burn rapidly. Amorphous boron 
May be transformed into crystalline boron by lining a crucible with it 
and putting in a piece of aluminum. Ata high temperature the alumi- 
um becomes charged with boron from which it is easily separated by 
disengages torrents of ammonia. Boron heated in a current of nitro- 
80 forms the same white infusible compound, and a similar result is ob- 
> When a mixture of charcoal and boric acid is heated in a current 
i nitrogen or of ammonia. From all this it appears that it is impossible 
tlt at boron in ordinary crucibles or furnaces without the formation of a 
% uret. The only mode of overcoming the difficulty consists in sur- 
‘nding the crucible containing the boron with a mixture of rutile and 
4, In which ease the nitrogen is absorbed by the free titamum, 
a red heat amorphous boron decomposes the vapor of water, boric 
nd hydrogen being formed. Sulphid of hydrogen is also decom- 
Y boron with disengagement of hydrogen and formation of a sul- 
i com 
lignign’ the , bro gr pee 
Pa hea the chlorid boiling at 17° C,, and the bromid at 90 
‘ Por-densities correspond to 4 volumes. There is also an oxychlorid, an 
*xybromid, an oxyiodid and an oxyfluorid, which however are not de- 
ibed in the notice before us. 
