of Chromium with Iron. 349 
however, had been raised by its having been struck with a ham- 
mer. Its fracture is white, conchoidal, and very fine in struc- 
ture. Like ordinary steel it is attacked readily by chlorhydric 
acid, evolving f tid hydrogen and forming an oily scum. On 
treating the polished steel, both tempered and untempered, 
with dilute and strong acids, no damask could be obtained, 
The analysis gave : 
eae 95°92 95°27 
Chromium. 22: 42, 168 2-23 
Aluminum. -..___..._ 2°38 1°69 
Calcium... =... 1. 204 
Magnesium ---____-- 0°12 
ICON wee ai whw ieee G12 
Carbon 0°98 
Phosphorus---_-_-- -- trace 
AS so wd seater trace 
101°62 
The carbon was determined as in 2. In analysis 1 the iron, 
chromium and aluminum were determined from an aliquot 
part of the oxyds precipitated together, by the addition of am- 
mMonia ; while in the second analysis the iron was separated a 
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tend to enhance the value of this compound as a steel, yet we 
find its content of carbon to be within the limits for producing 
4 good quality of steel. j 
The exuacetane properties possessed by the chromium 
steel, may, in a great measure, be attributed to the uniform 
distribution of a hard uncrystalline alloy of iron and chromium 
Tough the mass of steel—so homogeneous, in fact, does this 
“ompound appear to be, that there is no veined structure or 
