ON THE ACTION OF AIR AND WATER UPON IRON. 33 
Second Course of Experiments. 
Tas_e III.—Box f. No.2. containing Specimens of Cast and Wrought 
Tron immersed in foul Sea Water. 
Sunk and moored a second time in the Foul Sea Water close to the mouth of the Great Kings- 
town main sewer, on a bottom of soft, putrid mud, on the 13th January, 1840, at one 
o’clock p.m. Weighed again and removed January 14, 1842, at same hour. Immersed 
732 days. ’ 
Box 6. No.2. Class No.1. Scotch Cast Irons. 





















2. 3. 4, | 5. 6." 7. 8. 9. | 10. 11. 
So |, es ons 3 & so. Ss 23 
ea Dimensions as e322 3 2 ze BS ae ss a Character 
<a Specimen. Es Se5 2s aS Re £5) 55 se Corrosion. 
a es =Ow | Ss 25 26 iS) oO | o's 
35 S2 |fF5/82|/ 52 | S2 |= a |8 
in. in. in. 
B 1) 5x5x1 | 42674 | 42164} 510] 7-285 | 0°821) 0-701) 0- 0- |Uniform. 
B 2) 5x5x1 | 43046 | 42326 | 720 /|10-285 | 1-160) 0- 2-983} 0: |Local Plumb. deep. 


Box £. No. 2. Class No.2. Welsh Cast Iron. 
0- 
0- 
Uniform. 
3°285 
Local Plumb. deep: 
10°457 
0-370 
1:179 
230 
732 
3 
4 
5x5x<1 
5x5x1 0- 3°893 
RB 





0- | 0-394 


42160 | 41930 
43032 | 42300 


Box £. No. 2. Class No. 3. Staffordshire Cast Iron. 
Local Plumbago. 
Uniform. 
767) 
0:985 
41700 | 537 
43527 | 69 
5x5x1 
5x5xl1 
42237 
BS 0:842 | 3-978 
Bé 43596 0111/0: |1-670| 0 


0: | 0- 





Box f. No.2. Class No.4. Irish Cast Iron. 
0- 
0- 
Uniform. 
Local Plumbago. 
543 
419 
7757 
5:985 
0°875 
0-675 
41442 
41938 
41985 
42357 
5x5x1 
5x5xl1 







2-361) 0: 
0- 8-236 



Box f. No. 2. Class No. 5. Mixed or alloyed Cast Iron. 
B 9} 5x5x1 | 43051 | 42811 | 240) 3-428] 0:386 | 0- 1:218) 0: |Local pitted. 
610) 5x5x1 | 42051 | 41255 | 796 |11-085 | 1-250 | 3-280) 0- 0: |Local pitted, deep. 
{B 11) 5x5x1 | 42029 | 41548 | 481] 6871} 0-775 | 0-982) 0- 0: |Local pitted. 
Box f. No. 2. Class No.6. Standard Bar of Wrought Iron. 

" B 12 e875 x3 x-875|23436|22901(535| 1243 1-402 | 0- | 6-000] 0: |Uniform Fibrous. 
Box 8. No. 2. Class No.7. Gray Cast Iron. Skin removed by Planing. 

p13 |5x5-x75| 33150 | 315541596] 2455 | 2-769 |0- | 0-580] 0+ |Uniform Plumb. 
1843. > D 
