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The world's most comprehensive, well document, and well illustrated book on this subject. With extensive subject and geographical index. 136 photographs and illustrations - many in color. Free of charge in digital PDF format.
Let the Good Book have the final word: “Young people, enjoy life while you can. Be happy and let your heart bubble over with joy. Follow your heart’s desire, but remember that every deed has its consequences either good or bad, for God will one day judge everything you have done. Don’t do things that will he hurt you, because you’re not young very long. Old age will come soon enough. Remember your Creator while you’re still young and enjoy your youth.” - Ecclesiastes 11:9 to 12:1.
The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographic index. 325 photographs and illustrations - many color. Free of charge in digital PDF format.
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pt. 1. List of patentees.--pt. 2. Index to subjects of inventions.