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Miljan Vucetic

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How much is 4x5?

Magnetising metals

In 1744, Gowan Knight presented his research on magnetising metals to the Royal Society. The method he discovered for permanently magnetising hard steels. The use of steel instead of soft iron greatly improved the otherwise crude compass needles used by England's Royal Navy, which then had a much longer magnetized life. Knight took out a patent for his compass in 1766. He devised better ways to suspend compass needles, and introduced the rhomboid shape now common for compass needles.Reference: Philosophical Trans., No. 474, p. 161

Good news...bad news...

"I have good news and bad news," a defense attorney told his client.

"First the bad news: The blood test came back, and your DNA is an exact match with the sample found on the victim's dress."

"Oh, no - I'm ruined!" cried the client. "What's the good news?"

"Your cholesterol is down to 140!"

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