Hi Fred,
The elements of hList and TList are strings. They need to be converted to numeric before plotting. One way to do that
hList
TList
ListLogPlot[Interpreter["Number"] /@ {hList, TList}, PlotRange -> All, PlotLegends -> {"hList", "TList"}]
Rphit, Thank you very much! I will make use of this solution on many issues later. Fred Mayer