Keith Malone <[log in to unmask]> wrote:

.I really do not think what you
>describe might be the reason for the droplets is the reason. I will know 
more this winter after January, 01, 2007.

You also describe droplets of water forming on the acrylic ‘around the 
cluster‘, but ‘not directly above it’.  The  rising moist air is not 
condensing on the acrylic until it reaches the part of the acrylic that is 
cooler located outside the cluster. 

In my observations of production colonies that had roofs with smooth 
surface facing inward, I was quite surprised how big of an affect surface 
properties had on the formation of condensation.  I found that the smooth 
surface caused about a cup of water to acuminate on the top of the inner 
cover each night, and the rough surface lids had minimal condensation.  
Perhaps wintering some with acrylic inner covers and some without will 
tell.  

Best Wishes,
Joe

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