ON RAILWAY BAR CORROSION. 91 
o Taste No. 1.—First set of Experiments, Dublin and Kingstown Railway : 
rails traversed Brees July 2, 1841 to April 30, 1842 only: period 303 days. _ 
E Total weight | Total weight |Gross weight|Gross weight} Total loss Firstdif-|Second dif. 
How exposed, | ofeach rail | ofeach rail | of the set | of the set of weight ference | =diff. be- 
&e. when exposed.|whenremoved.| when laid | when re- ineach |=Corro-| tween cor. 
July 2, 1841, |April 30, 1842.) down, moved, set. sion in | in and out 
use, of use. 
cwt. grs. |cwt. grs. grs. gTs. grs. 
24+-15,885 | 2+13,125 
2415,175 | 2+13,125 
- | In middle of 
| line, and not “gy ig railitptesicats 
- | travelledover. 24.14,875 | 2413125 
Set No. 1. 
Corrosion 2+ 3,900) 24 1,750 
2-+432,375 | 24+-28,875 | 9,491,555 | 9,476,250 | 15,305...]......... 
2412,950| 24. 6,890 
2+ 7,885 | 24 1,970 
On the East 
|side of Up| 2+17,500| 2+19,142 
Line. 
- | 2413,410] 24. 7,875 
Corrosion 
and 2-+-29,975 | 2+-21,875 
abrasion, 
Set No. 2. 
24.40,250 
24. 3,495 
2+23,070 | 2+18,775 
On the West 
|S: | side of Up | 24 3,750} 2— 1,275 
Line. 
no 2+ 2,950) 2— 875 
Coal-tarred. 
Set No. 3. 
2421,830| 2416,550 
”|Abrasion only. 
2 2+-11,900 | 2+ 8,750 | 9,478,856 | 9,453,350) 25,506 J 


_ Weare enabled to draw the following conclusions from this Table No. le 
_ Ast. On thirty lineal yards of rail in use, the amount of abrasion is=25,506 
om in 303 days=30,725 grs. per annum, or at the rate of ——_—— Sore — 1024°16 
gh. per yard per annum. 
The following is Mr. Bergin’s statement of the amount i traffic which 
Passed over the line from 2nd July 1841 to the 30th April 1842. 
Passengers.—1841. 
Pet are ema tases. SOOaO 
Septengee ne aw cree vie cess ‘67,901 
October .......... wil VCE DBs 
November ...........00--. 39,355 
December .......22..00+--.+- 36,809 
Total, exclusive of Subscribers ...... 362,011 

