| Year | 1956 |
| Date | 16-Feb |
| Volume | 114 |
| Issue | 2,856 |
| Page | 262 |
| Category | Steam |
| Part | |
| Title | Steam as a Driving Force |
| Author | G.W.McArd |
| Notes | Babcock and Wilcox boiler at Castle Donnington, a Pennsylvanian Railroad 6-4-4-6 Class S1, advantages of the three types, disadvantages of the types, rail transport, road transport, marine transport |