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pmccarthy

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pmccarthy last won the day on September 23

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  1. I got this message: Hi Peter, Thank you for your email. We have forwarded it to our Museum of Optics in Germany and will let you know what it is once they have replied. Kind regards, Ines
  2. It is very heavy cast iron. One of the four feet has a screw adjuster so it is very stable.
  3. No serial numbers that I can find. But I havent disassembled it.
  4. After looking at this in a secondhand shop for two years, I finally bought it. It is a 3-axis thingamejig by Carl Zeiss. I don't know what it is. But it had superb control of X-Y by the two wheels, and Z by the knurled ring on the shaft. I can think of mounting a camera on it for precise close-ups. Or mounting a bar with two points to transfer positions precisely from drawing to job. Or fit a thin arm for assembling a ship in a bottle, or putting the pilot into an Airfix model. Maybe I will just admire it.
  5. I thought Nigella always gave a well-rounded presentation.
  6. pmccarthy

    Quickies part 2

    One of the safety mantras at work 50 years ago was "steel against steel", which meant don't do it!
  7. My wife and I had 750 olive trees on the property we sold four years ago, we are still enjoying oil which has been kept cool and out of light in stainless steel containers. No need for additives or anti oxidants or whatever. It loses its greenness and bite but is still tasty.
  8. Too much wealth.... My Karcher pressure washer died yesterday, I think it blew an internal seal. For the first time in my life i did not take it apart and try to fix it. I took it to the bin. That is now my policy, life is too short to engage in an intellectual competition with designers and manufacturers who don't want you to fix things. It will cost me money but it will save me a lot of grief and distraction.
  9. pmccarthy

    BREXIT.

    I have the wartime book on how to raise chickens on kitchen scraps if you need it.
  10. He is not the first world leader to be a narcissistic nut job. Many are quite successful in ruling for decades. The only difference with Trump is modern media coverage.
  11. I learned about aerial photogrammetry for map making. Learned how to view photo pairs without a viewer, by squinting in the right way.
  12. I think the best grounding in mechanical skills is a few years building Meccano when you are quite young.
  13. I have recently discovered the great advantage of the old Imperial system. When you are trying to reproduce old and damaged parts, it can be impossible to know what the original dimension was in millimetres. But in inches it is obvious. This was a one-inch board, or the rebate was 7/8 inch deep.
  14. I think those first steam engines used greasy hemp packing.
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