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THREE:I had wished to publish this book a long time ago, because I think it my duty to submit to the opinion of the public the things which I witnessed in the unfortunate land of the Belgians, and where I was present at such important events as an impartial spectator. I call myself an impartial spectator, for if this book be anti-German, it should not be forgotten that the facts give it that tendency.An interesting example in the use of belts for communicating power to movable machinery is furnished by the travelling cranes of Mr Ramsbottom, in the shops of the L. & N. W. Railway, at Crewe, England, where powerful travelling cranes receive both the lifting and traversing power by means of a cotton rope not more than three-fourths of an inch in diameter, which moves at a high velocity, the motion being reduced by means of tangent wheels and gearing to attain the force required in lifting heavy loads. Observing the operation of this machinery, a person not familiar with the relations between force and motion will be astonished at the effect produced by the small rope which communicates power to the machinery.