| 106 | × | (10 10 + 19 10) | = | 307 | |
| 131 | × | (10 10 + 9 10) | = | 249 | |
| 42½ | × | (10 10 + 39 10) | = | 208 | |
| 78½ | × | (10 10 + 25 10) | = | 275 | |
| Sum, | 358 | Sum, | 1039 | ||
| and 1039 – 358 = 681. | |||||
361. On the Baltimore and Ohio Railroad we have,
| Miles. | Max. grade. | |
|---|---|---|
| Baltimore to Harper’s Ferry, | 80 | 82 |
| Harper’s Ferry to Cumberland, | 98 | 40 |
| Cumberland to Raccoon, | 88.2 | 116 |
| Raccoon to 148⅔ miles, | 60.5 | 40 |
| 148⅔ miles to Wheeling, | 51.3 | 80 |
And as before,
80 × (10
10 + 35
10) = 360
98 × (10
10 + 17
10) = 265
88.2 × (10
10 + 49
10) = 520
60.5 × (10
10 + 17
10) = 163
51.3 × (10
10 + 35
10) = 231
Sum of Col. 1 = 378, Sum of Col. 3 = 1539; difference 1161.