OTHER PROPERTIES OF CAST IRON. 185 
No. I. 
ENGLISH IRONS. 
Apedale, No. II, Pig Iron, Hot Blast, Newcastle, Stafford- 
shire. 
EXPERIMENT 2nd. 
oe NENT Ist. {Depth of Bar.. . 1.025 cereal 3rd. 
Depth of Bar.. -1.010}Breadth do. ......... 1-002 {Depth of Bar.. ... .1.015) 
Breadth do.. 1.015 Pistance between a Breadth do.. -1.015 
Distance between por Soyes.s . Gin. jDistance hee sup- 
supports. . .-4ft. 6in |W eight of Bar Sit. Ghee it. 3i 
Slbs. doz. 
Weight Deftection ee Weight!p oHection 23 Weight) Deflec ae 
tbs. [Mm inches./ & = | yp, lim inches.) = F pa Vinee fet 
as ag as 
ee ae eae I Pees 
G12| .275 |.008}112| .280 |. 
182! .485 |.019]182] .490}. 
238} .674|.040] 238} .672 |}. 
294} .882 |.068] 294) .874). 
350 | 1.115 |.110] 350} 1.098 |. 
378] 1.242 |.138 | 406 | 1.340 |. 
406 | 1.372 |.165 | 462 | 1.613 | .227] 784). 
434 | broke 476 | 1.700 |brokel 896 |.370 | .040 
952 |broke 
This bar was unsound a 
the bottom side, and brok 
72 inches from the centre. 
Broke one inch from 
the centre. 
. Broke at the centre. 
Results reduced to those of Bars 1.00 inch square. 
ae a ee SS 
Product 
Modulus of | Breaking | Ultimate |b x d or 
Specific | elasticity in | Weight, |deflection,| power of 
Gravity lbs. (J-) (d.) resisting 
impact. 
Exp. 2nd, bar 4ft. 6in.......... 7.017 14852000) 457| 1.730] 790.6 
Exp. 3rd, bar 2ft. 3in... . | 910.4| .405}| 368.7 
This Iron presents a clear and rather open fracture ; when viewed with 
a magnifier, the crystals appear porous in the centre, but smaller and more 
compact as they approach the outer edge. 
Appearance light grey, slightly tinged with blue.—It is a free working 
iron, rather stiff in its texture, but yields moderately to the chisel and file. 
I should conceive it useful in combination with metals of greater fluidity. 
Q 
