1. 
   siphon barometer
   Barometer that has a J-shaped glass tube containing mercury. The wheel barometer was developed using a siphon tube.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   siphon-barometer
   Barometer that has a J-shaped glass tube containing mercury. The wheel barometer was developed using a siphon tube.
   Found op http://www.antique-marks.com/antique-terms-s.html
   
   

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