90134b2a   
   From: stauffer@usfamily.net   
      
   George Herold wrote:   
      
   > Beside Phils suggestions at the longer wavlengths people also use CaF   
   > and MgF.  Neither is cheap and the MgF (good out past 10um IIRC) is   
   > hydroscopic.  When not in use you have to keep it in a dry bell jar.   
   >   
   > George H.   
      
   There are folks who have good coatings for both MgF and NaCl that work   
   amazingly well to keep moisture out (don't let them sit out in the rain,   
   nor get immersed in a flood).  With normal care and handling they will   
   last for quite awhile. Don't know what the coatings are- they are   
   proprietary, but they do work.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)