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Dutch lens-maker built a two lense microscope.
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Importance of finger prints were discovered.
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Brittain offical asked workers to sighn papers with finger print incase they got in trouble.
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French police men realised photos can help solve crimes.
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Brittain scientist wrote a book about finger prints.
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Austrian Docter Karl Landsteiner learned that not every one has the same kind blood.
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Scotland yard used Galton-Henery system.
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Landsteiner helped divise the simple abo test for bloodsteins.
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A Frenchman Edmond Lochard set up the first forensic lab.
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Brittish scientist Alec Jeffreys discoverd something that was very important for the future of forencic science.