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The only comprehensive illustrated history of Frank N. Piasecki and his H-21 advanced technology helicopter. The Piasecki H-21 became the first successful tandem-rotor cargo helicopter to enter mass production. Its innovative and unique design became the basis for the development of both the CH-46 and CH-47 helicopters, which remain in service to this day. The book covers the early life of Frank N. Piasecki and the development of his first hel...

Excerpt from The Rhabdocline Needle Cast of Douglas-FirWilson and Wilson (70) first reported the disease in Europe in 1926, and described its symptoms on two varieties of Douglas-fir in Scotland. They traced the development of the fungus in the needles and gave the first summary of the life history of the fungus. The initial infection in Scotland was believed to have originated from Douglas-fir transplant stock imported from the Northwestern U...

Excerpt from The Rhabdocline Needle Cast of Douglas-FirWilson and Wilson (70) first reported the disease in Europe in 1926, and described its symptoms on two varieties of Douglas-fir in Scotland. They traced the development of the fungus in the needles and gave the first summary of the life history of the fungus. The initial infection in Scotland was believed to have originated from Douglas-fir transplant stock imported from the Northwestern U...