Dr. Pearson's Observations 
448 
The artist who assisted me in examining this tool, observed 
that it was only made of stedl for about an inch from the edge ; 
but that the rest was iron ; for he conceived it to be impossible 
to be all steel, on account of the eye for the wooden shaft. 
However, on filing different parts, and cutting the instrument, 
no seam could be discovered,where iron had been welded to steel ; 
and every part appeared susceptible of induration and emolii- 
tion, by the usual treatment of steel to produce these changes. 
(c) The specific gravity, before hammering, was 7,802, and 
after hammering the same piece, it was 7,880. After ignition to 
whiteness and sudden quenching, the specific gravity was 7,384. 
( d ) 300 grains of this metal dissolved in sulphuric acid and 
water, and afforded black matter and sulphate of iron ; with 
the same phenomena as the dissolution of the sword, fig. 1. 
afforded. The black matter was carbon, in apparently the 
same proportion as was obtained from the dissolution of the 
sword, fig. 1, 
(e) Several parts of this axe being just wetted with nitric 
acid, they became black spots, as is the case on so applying 
this acid to steel, 
hi. The Dagger , fig. 4. Tab. XV. ( a ) Being polished, it had 
the appearance of steel. — It was not so hard as the sword, fig. 1. 
but it was so very strong and tough, that it was with difficulty 
broken, and could be bent very considerably. — Its fractured, or 
rather torn surface was open-grained, and crystallized. — It was 
more malleable when cold, than hardened steel usually is. 
( b ) In its ignited state it was very malleable. It was sus- 
ceptible of induration and emollition, by the ordinary treat- 
ment to produce these changes in steel. 
(c) The specific gravity of this dagger was 7,413. 
(d) The dissolution in sulphuric acid and water afforded 
