ON THE ACTION OF AIR AND WATER UPON IRON. 39 
\ 
Box 6. No. 4. First immersion. . 
Wrought Iron and Steel. 











10. | Lk. | 12. 13. 14, 
#: |3,8|2, 3 
Sag/ Ss 'Q/ed oS . 
i g s/F Rese : a 
S88] %5 =| Ree Character of Corrosion. 68 
oe%| soa | a2 3 
21-93 | 2-474 |0' | Very locally and deeply acted on, fibre developed at the ends ..... ..[Hot 
18°33 | 2-068 |0- | Very locally and deeply acted on, fibré developed at the ends ....: {Hot 
25:92 | 2-924 |0- | Very locally and deeply acted on, fibre developed at the ends ....... Hot 
22-75 |2°566 | 0: | Fibre st¥aight, corrosion uniform .1........ as PUL EREL A Ae Cold 
10-94 | 1-234 |0- | Fibre tangled, indistinct, corrosion uniform ...... Baia soa jisttasses. (Cold 
| 12-82 | 1-446 | 0: | Larfiellar on the edges, sides slightly pitted, cotrosion local.......... Hot 
15:07 | 1-700 | 0- | Fibre straight, corrosion nearly tiniforin .....4:....02.: Pehesick ads Hot 
11°89 | 1-341 | 0° | Fibre straight; corrosion nearly uniform «....4....é050.2 ss s0ec0eteeccs226./00ld 
13-02 | 1-469 |0- | Fibre straight, corrosion nearly uniform, ends more acted on .;:,.:.{Hot 
1868 | 1-543 | 0: | Fibre ees, indistinct, corrosion local Pa arate ati seseesseese[ELOt 
_ E J | Fibre tangled, corrosion loéal and pitted, a few spicular crystals 
14-00 | 1:579 |0 { PLOPEUR MTOM Vite CUGCS clentscadsrestoscaceaakcrtaccsdccsecacesccaccecch ald 
| 19°39 | 2-187 |0- | Fibre straight, deeply and beautifully developed, lustre silvery....... Cold 
9:97 | 1-124 |0- | Lamellar on the edges, corrosion somewhat local, and pitted......... Cold 
17-28 | 1-949 |0- | Fibre straight, locally developed, corrosion most at the ends..........|  ,, 
7-79 |0-878 | 0: | Locally pitted, no-fibre developed, except at the ends :......:.. se4.../Cold 
15-52 | 1-751 |0: | Fibre wavy, strongly developed, much corroded locally at both ends . y 
7-82 | 0-882 |0- | Fibre straight, uniform Corrosion........::secccsccecssesseedeeecesseeessede Cold 
8:87 | 1-001 |0- | Fibre indistinct, smooth uniform corrosion, sub-cryst. struct. visible .|_,, 
. Y . {| Corrosion uniform, smooth, no fibre visible, mammillary pits on 
18-21 |1-490 | 0 { BIGCN BUD OMON sac se cdl dmeenecOyadesecuessatusausercabacenates sei BAe 2 
17-73 | 2-000 | 0- "| Corrosion uniform, crystal. structure developed, with silv. plumbago «| ,; 
10°82 | 1-220 | 0: | Corrosion local, pitted on sides, lamellar edges and ends .2:...4.1..4. 
13°01 | 1-467 | 0 { Corrosion local; pitted on sides; fibre straight, and developed me 
} SONGS AUG, COBEN Jicscn88si433cactoniciswcnsisccisshidesodatelvetsvesess a 
11-22 | 1-265 Corrosion uniform, smooth, no fibre developed ..............00...ece00e oo 
0: 
10:58 | 1-193 | 0- | Corrosion uniform, smooth, no fibre devel., local pitting at oneend .|_,, 

. Cast and Wrought Iron. First immersion: 
= — - S 
pi 3-96 | 4-47 100 Fibre or spicula at both ends, sides smooth, zinc black and brittle, 
es easily detached, surface beneath bright. aa 
4] 5-0 Surface covered with a crust of oxides of zinc and iron, bluish- a77 
(hae Pa it white colour, corroded beneath in spots: hot 


