Today I thought I'd add some information about method. For those of you who are not familiar with encaustic, it is a beeswax-based paint with ancient origins. (If you have specific questions or want to try painting with it, I highly recommend reading Joanne Mattera's book The Art Of Encaustic Painting.)
Encaustic has to be melted on a temperature controlled heated pallet. First, the panel or ground is prepared by painting the entire surface with the encaustic medium and then fusing it into the wood, usually with a heat gun. Then more encaustic can be applied with a brush or a pallet knife or as I did with this piece and the previous 2-D posts with dots, melted directly to the prepared surface with a craft iron. This means each circle was individually mixed in a circular pattern and fused into place.
My niece tried to count the circles in my piece "Bubbling Up" ( posted here earlier today)...I don't remember the final count.
Maybe I could start a contest, something like guessing the number of marbles in a jar...