238 . Scientific Intelligence. 
color turns to the black of the new oxide which now resembles 
charred cork. The vesicular mass is rubbed to powder and 
washed with water containing a little sodium carbonate to re- 
black in color with a brown shade, has a graphitic luster when 
pressed, has the formula TeO or a multiple of it, is decomposed 
by potassium hydrate on boiling, and by hydrochlorie and sul- 
phuric acids in the cold, is oxidized readily by nit id an 
colors sulphuric acid red as it dissolves in It, caisitogs sulphate 
being deposited from the solution. It appears to have neither 
acidic nor basie properties. The authors have also prepared and 
critically examined tellurium sulphoxide, obtained by acting on 
tellurium with sulphur trioxide in a closed and exhausted tube, 
Heat is evolved and the loose gray tellurium passes into the 
bulky deep red sulphoxide. After digestion at 30°—-40° the ex- 
transparent in thin layers, quite stable when kept in closed tubes ; 
having the formula SO,Te; and decomposed by water into tel- 
ogee being converted instantaneously into a brown substance 
at 90° which bad identically the same composition, To the red 
modification the authors assign the formula 0} ss ; to the 
2 
brown variety the formula O nae 
In a subsequent paper, Divers and Shimosé have described a 
new and delicate reaction for tellurium. When sulphuri¢ acid 
holding | Hones a minute quantity of tellurium dioxide is 
oured into a hydrogen apparatus, the escaping gas will contain 
hydrogen telluride, If now this gas is passed into the telluretted 
sulphuric acid the red color of tellurium sulphoxide is developed 
in the liquid. If the gaseous current be continued too long, the 
 @, 
n the cee: of Sulphides by Pressu pean has 
continued his researches upon the production of "ehenient com 
pounds od means of scien and has now given the results of 
ra g various metals mixed with on en both finely divided, 
toa pomicre of 6500 semaphores Macnesium after six pressings, 
each time being reduced to flings, ave a Seiya basins gray 
mass having a weak metallic luste Mixed water at 50° or 
on 60; py eoues sulphide was eiabvad, os water becoming go 
