"Referring now to FIGS. 5 and 6, which, as with FIGS. 3 and 4, do not, for simplicity's sake, show the indicator lamp, power controls and related wiring that can be incorporated, show an arrangement in which the heated surface 25 is a funnel made of glass or other ceramic material that has electrical resistance heating wires 26 wound directly around its outer circumference over its norrower lower r" . . . .