Two issues from this series, both describing archetypal US Locomotive types.
A camelback locomotive (also known as a Mother Hubbard or a center-cab locomotive) is a type of steam locomotive with the driving cab placed in the middle, astride the boiler. Camelbacks were fitted with wide fireboxes which would have severely restricted driver visibility from the normal cab location at the rear. (Wikipedia)
The American 4-8-4 were ideally suited to US conditions pulling high speed passenger trains or heavy fast freights.
Well illustrated with plans, drawings, photographs and coloured plates.