ON THE ACTION OF AIR AND WATER UPON IRON. 
279 
Welsh Cast Iron. Chilled. 
6. 7. 8. 9. 10. a Ba 13. 
|— a a $$ 
i Weight of| Totalloss| Lossof | Lossof | 6,3 
| Dimensions | Weight of} Specimen _ |Weightper| Weight | 253 Character 
1 of Specimen after Corrosion |squareinch| referred to} “to,= 5 of 
Specimen. | in Grains.| 387 days’ in of Standard | ‘33 2 Corrosion. 
: exposure.| 387 days. | Surface. Bar. 5 3a 
in. in. 
ax. 1 41990 41538 452 6-45 *608 0- Uniform P. 
5x1 43830 43251 579 8:27 -780 0- Tubercular. 
Staffordshire Cast Iron. Chilled. 
5x5 x1 42870 42395 475 6:78 -640 0: Uniform. 
5x5xl1 44290 43868 422 6:03 569 0: Tubercular. 
Irish Cast Iron. Chilled. 
}5x5x1 | 42790 | 42296 | 494 | 7-06 | -666 | 0- | Uniform P. 
x5xil 42757 | 42288 469 6:70 632 0- | Tubercular. 
Mixed Cast Irons. 
f 5x5x1 43259 42875 384 5.48 517 5:0 | Tubercular. 
5x5xl 42522 41970 552 7°88 -734 Tubercular. 
g 
5x5x5 | 41589 | 41140 449 6-41 605 0: | Tubercular. 
fairbairn’s and Hodgkinson’s Experiments on Cohesion. 
«1-25 x1-25} 9132 | 8926 206 | 11-40 | 1-075 | 0 | Uniform®P. 
xl x! 7504 | 7332 172 9:55 901 0: | Uniform. 
x1 xl 7231 | 7061 170 9-44 891 | 0+ | Uniform P, 
x | 7877 7733 144 8-00 75d 0- Uniform P. 
7454 7301 153 8-50 *802 0- Uniform P. 
7960 7826 134 7°44 -702 0- Uniform. 
7370 7215 155 8-61 +812 0- Uniform P. 
kin removed by Planing. 
5x as| 34130 | 33595 | 535 | 8-23 | 776 | 0: | Uniform. | 
_—_—— 
