Some folks say a man is made out of mud,
But a poor man's made out of muscle and blood.
Muscle and blood,
Skin and bone,
A mind that's weak and a back that's strong.
" Sixteen Tons" (1947)
An Acknowledgement of a Great Debt to a Great Man
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Line drawings and diagrams in this work are by Dr. Samir El-Shafey, Faculty of Veterinary Medicine, Cairo University, Egypt