I want to know where has he placed the tube and how he adjust the height ? Please refer the link below marked in violet http://lnr.li/m19fP Please explain using simple diagram for better understanding

  • $\begingroup$ Please anybody give the answer $\endgroup$ – user230720 Jun 16 at 17:31
  • $\begingroup$ Note that the article is not about a compressed air test system but about a system where he noticed air compressing. $\endgroup$ – Carl Witthoft Jun 17 at 14:03
  • $\begingroup$ Answer anybody with proper diagram $\endgroup$ – user230507 Jun 19 at 10:21

I think the setup is too trivial for most history pages to bother with, but there is a picture in the book "Young Explorers’ Guide : The Search for Ingenious Treasures" . Unfortunately, that picture does not display in the Google Books search.

This is a simple case of a lever arm: the mirror remains at a fixed distance from the pivot, while the lead weight can move. According to other descriptions, the mirror is positioned by means of a pulley& rope which presumably is tied down. The movement of the lead weight is almost irrelevant other than to provide stability for the entire lever arm at any mirror height.

  • $\begingroup$ Please provide a diagram which might give me a clear idea $\endgroup$ – user230507 Jun 18 at 5:18
  • $\begingroup$ Please explain ..................... $\endgroup$ – user230507 Jun 18 at 7:59

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