Re: Home VSH Testing
liquid nitrogen is nice because it freezes quickly, then boils off quickly. If you're wanting to test for brood removal, perhaps dry ice would be an acceptable substitute. It can be pulverized into a granular powder easily by placing into a sturdy container, and whacking it with the top of a claw hammer or piece of wood. Shaking the container the way one would flip an egg in a skillet without a spatula will raise any un-pulverized chunks to the surface for another round of pulverization. Or, you could sift through 1/4" hardware cloth.
If you do use the dry ice, know that because it takes longer to sublime than liquid nitrogen does to boil, the area that will be frozen will be a bit larger than the area of application.
Pete. New 2013, 3 hives, zone 5b
To study and not think is a waste. To think and not study is dangerous.