new bolt-holes. The drilling-machine
is set at the same angle as the rail lying upon its side.
This insures rapid and accurate drilling.
Details scanned from the original print:
a. Drilling New Bolt Holes-Overall
b. Driller at Work
c. Driller's Face
d. Chain Binder
e. Compressed Air (or Water) Line
f. Machine Detail
Note: There were systems of supporting guides
(made from old rails) which allowed the rails to
be moved about without having to be bodily lifted.
Those can be seen here and in Image 16 & Image 17.