478 Scientific Intelligence. 
Kranchen gave free CO, 1:5277, combined 0°6782, total 2°2059 
grams. Carlsbad Gudviibehatie 14122 free CO, 0°7966 com- 
bined CO,, total 2°2088 grams. Marienbad Kreuzbrunnen 2° 6355, 
combined 0°9055, total 35408 grams.—J. pr. Ch., II, xvii, oe 
July, 1878 © A 
; On Tleminiins ines of various hing alae production fois 
the blue ultramarine containing so of a yellow ultramarine 
in which the sodium is replaced. by algae was aceon plistod some 
time ago by Heumann by heating the former substance, mixed 
with a Suse cnted solution of silver nitrate, to 120° in a sealed 
ws The attempt to form other analogous “ultramarines in. this 
way was a failure, DeForcranp and Battin have now suc- 
ceeded in devising a general method of preparing ultramarines 
agate different metals, and by which they have already Ng 
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process consists in arti g the yeilow silver ultramarine by 
the above method and then in heating an intimate mixture of 
this with the metallic chloride desired. To produce the silver 
product, the authors heated, for fifteen hours, ten sealed tubes, 
a pertectly homogeneous mass of transparent yellow grains. 
contained silicon, -alumin um, sulphur, silver and oxygen; is insol- 
uble in water. ,and w ndecomposable by strong acids, Heated with 
an intimate admixture of sodium an repeatedly, the sodium 
replaces again the silver and a blue ultramarine is obtained, of a 
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If potassium chloride be used, a a bluish-green ultramarine 
is produced. Barium chloride gives a yellowish-brown, zinc chlo- 
ride a violet, and magnesium chloride a gray compound, here 
all the properties of ultramarine.— Bull. Soc. Ch., Il, xxx, 112, 
August, 
3. On Che e Steel— BoussInGauLT has made an investigation 
into the pridaction, the constitution and the properties of the 
so-called chrome steel. This steel is prepared by mixing in the 
erucible the required proportions of any suitable steel “and an 
alloy of iron and chromium called f hr This alloy 1s 
but only seven to ten when made in a high furnace. The 
covery of this steel, the author attributes to Berthier in 1 1820, and 
gives extracts from his memoir describing his experiments. be 
were 
