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[^SSEMBLY 
servations, and may serve as well to illustrate the general character of 
the iron in this respect, as to indicate the effect of the several methods 
of preparation on the density of iron. 
» 
The following experiments confirm the evidence already adduced of 
the great toughness and ductility of this variety of iron. Besides the 
facts mentioned under the head of observations in the 7th column we 
may add that after the first fracture on each bar, a measurement was 
taken between two of the inch marks still remaining on one of its parts 
and the following results obtained, viz : 
No. 1. In an original length of 6 in. had been elongated .87 in.= 14.5 pr.ct. 
II. " " 4 " " " 2 "= 5 " 
III. " " 5 " " .6 "=12 " 
IV, " 4 " " " .2 "= 5' " 
