ON THE ACTION OF AIR AND WATER UPON IRON. 49 
Series. Box ¢. No. 6. 
Wrought Jron and Steel. 


* |14:49 | Uniform fine fret, pitted locally at one end. 
612 | Uniform fine fret. 
12-5. | Uniform fine fret. 
9.) 10. | Il. | 12.) 18 14 
Pees 12 us | £8 
Oo} Meg | wos |S ,| Sa 
Be| fee | Sue |23| £33 
Bol. Sk lwte | Os] daa Character of Corrosion. 
SE] oon | Ces }a2)/ BOR 
Ss|2-¢ | 28s |3*| gos 
8 me [a @/e ne 
58} 8-95 | 1-009} 0: | 12-15 | Uniform minute pitting, or fine fret. 
57| 9°65 | 1:088) 0: | 18-10 | Uniform fine fret. 
45 | 6:96 | 0:785| 0: | 9:45 | Uniform fine fret. 
333 | 15°49 | 0°748| O- | 21-03 | Nearly uniform fine fret, most at the ends. 
at Par se | see | «s. | No specimen. 
859 | 11-83 | 1:334| 0: | 16-06 | Uniform fine fret. 
168} 10-36 | 1-168} 0+ | 14:07 | Uniform fine fret. 
276|10-13 | 1-142} 0+ | 13-75 | Uniform fine fret. 
77| 8-43 | 0:951| 0- | 11-44 | Nearly uniform fret, some local pitting. 
60} 6-66 | 0-751} 0- | 9-11 | Nearly uniform fret, some local pitting. 
88] 9-91 | 1-118] 0: | 13-45 | Uniform fine fret, fibre discernible. 
118] 10-10 | 1-139} 0- | 13-71 | Uniform fine fret. 
281] 9-54 | 1:076| 0- | 12:95 | Uniform very fine fret. 
104} 6:37 | 0-718} 0: | 8-96 | Uniform fine fret. 
219} 13:51 °| 1:749| 0- | 18-34 | Uniform coarse fret, approaching to local pitting. 
256 | 11-91 | 1:343| 0: | 16-22 | Uniform very fine fret. a 
-83| 3:07 | 0°346] 0- | 4-16 | Uniform fine fret. he 
112} 8:96 | 1:010| 0- | 12-16 | Uniform coarse fret. ; 
241) 11-21 | 1-264) 0- | 15-22 | Uniform very fine fret, the pitting mammillary. 
157| 6:98 | 0:787| 0: | 9:47 | Uniform fine fret. 
175| 9:03 | 1-018] 0+ | 12:26 | Uniform fine fret. 
0 
0: 
0 


Zinked Wrought and Cast Iron. 

o 10 0- 0-*| Oo Surface smooth, free from rust where covered with zinc, 
which has a coppery tarnish, but iron rusty where bare. 
A ses j 4 0+] 0 Paint sound and good generally, but beginning to rust 
|| a a +i through in blotches, and zine to oxidize. 

_ weight by oxidation of zinc and iron. 


1843, E 
