Hej
Här en link till ett froskningsprojekt (1920) från "Kansas State Agricultural Collage and Experiment Station" angående övervintring av samhällen under olika förutsättningar.
http://ia700404.us.archive.org/0/items/cu31924052051228/cu31924052051228.pdfCitat:
"Six hives containing a known amount of honey and a known number of bees were placed on scales, and daily readings taken
of all changes in weight. Three of these hives were sheltered by a windbreak while
the others were not.
Each set of three consisted of one one-story hive, one twostoryhive, and one packed hive. These observations show that the two-Story hive is preferable
to the one-story hive, and the packed hive is much to be preferred
over the unpacked hive.
It was also shown that a windbreak is very essential,
especially to colonies which have no other form of winter protection.
The effect of a severe winter was found to be less injurious
to the over- wintering of bees than an open winter.
Colonies which are packed for the winter consume more
stores, owing to the fact that more stores are necessary, due to
increased brood rearing."
Citat slut
Det visas här ett klart stöd för Janos sätt (och inte enbart hans) att det är bättre med två lådor på höjd, ett visst skydd mot vinden hjälper, att kalla vintrar är bättre än milda.
Men även att mera foder går åt i en isolerat kupa pga. av större yngelsättning.