Two On A Big Ocean The Story of the First Circumnavigation
of the Pacific Basin
in a Small Sailing Ship

      

Other Books by
Hal Roth
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Re: Horizons and levels

From: Jared Sherman (no email)
Date: Tue Jul 15 2003 - 15:03:47 EDT

  • Next message: Jared Sherman: "Vapor pressure of mercury: 0.0017 torr at 25C"

    Is Ken G. from Celestaire with us right now?

    I ask because they have http://www.celestaire.com/catalog/products/0511.html a "practice bubble level" attachment for $49 which is only stated to give a final observation within 2 minutes of accuracy.

    That would set "good enough" (or not<G>) and cheap enough (or not) at $49 for a compact device that will allow 2 minutes of accuracy.

    Better models with more respected names seem to range from $700 to $1800...with no accuracy mentioned.

  • Next message: Jared Sherman: "Vapor pressure of mercury: 0.0017 torr at 25C"



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