Disk with glass center section, and flames behind the glass

Fall of 1956 or 57, Newport, NH.  My mother related this UFO experience to me.  While I was there, too, I was too small to remember it (I was born in 1954).
My mother, the woman who usually babysat us, my brother and I were all in our back yard.  It was just after dusk and getting dark.  My mom and the other lady were dipping apples that had fallen from the tree in the back yard into a sulphur solution to kill the hornets that were feeding inside of them (to this day, that part of the story sounds as bizarre as the UFO part of the story itself!).  My brother started crying because a hornet got in his boot and stung him.  But just then, a disk shaped object came out of the sky and hovered near us.  It had a section in the middle that was made of glass through which could be seen bright flames burning.  My mother felt like it was about the distance away as the top of a telephone pole, yet she felt the impulse to just reach up and touch it...it seemed so close.  And then the thing shot up straight into the sky at a supernatural speed and disappeared.
Witness indicates that date of sighting is approximate.  PD