 | 1938 - 220 páginas
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 | Engineers' Society of Western Pennsylvania - 1906 - 624 páginas
...dispatch. His attempts failed through ignorance of the fundamental physical properties of air. The latter part of the eighteenth century and the early part of the nineteenth mark the real birth of air power. During this period Medhurst, the great Danish engineer working in... | |
 | Russell Blankenship - 1931 - 766 páginas
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 | Seward Charle Staley - 1939 - 354 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
 | William Henry Holmes - 1940 - 700 páginas
[ Lo sentimos, el contenido de esta página está restringido. ] | |
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The first expressions of co-operation were found in the co-operative and communistic colonies which settled on the land in the latter part of the Eighteenth Century and the early part of the Nineteenth Century. 
