There is one thing that yours alone, which no one else can have, and that is yours fingerprint. You leave your fingerprints behind when you touch anything. The Chinese were the first people to know this. So they used a thumbprint instead of a signature on very important papers, A signature can be copied but a thumb can`t .
In the late nineteenth century the real importance of fingerprints became known. A man called Sir Francis Galton began to study the lines of finger tips. He found that no two people had the same pattern of lines. He also learnt that the lines do not change as a person grows older.
The police saw at once how fingerprints could help them. They began to keep records of the fingerprints of people who were known to be thieves.
When the people want to find out whether a person has stolen anything before, they take his fingerprints and compare them with those they have. With so many prints on record, it would seem very hard to check but the police can usually find out in a few minutes.
In the late nineteenth century the real importance of fingerprints became known. A man called Sir Francis Galton began to study the lines of finger tips. He found that no two people had the same pattern of lines. He also learnt that the lines do not change as a person grows older.
The police saw at once how fingerprints could help them. They began to keep records of the fingerprints of people who were known to be thieves.
When the people want to find out whether a person has stolen anything before, they take his fingerprints and compare them with those they have. With so many prints on record, it would seem very hard to check but the police can usually find out in a few minutes.
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