(1) The temperature in the esker is assumed to be at a constant level equivalent to groundwater temperature.
(2) Concentrations of radon indoors and temperatures indoors and outdoors have been recorded every hour with some interruptions for one 12-week period in a dwelling situated on top of an esker outside Stockholm.
(3) The concentration of radon in the house shows variations, which can be explained as a combined stack effect in the esker and in the building.
(4) Dickens's genius for human observation at its quickest reaches a kind of pinnacle with the young man who tries to exercise his French and says "Esker" at a Veneering dinner, says nothing more and never reappears.