Tom Swift and His Polar-Ray  Dynasphere, Victor Appleton II © 1965, published by Grosset  & Dunlap, #25 in the series.  You'll just  love this science fiction adventure book, that soon should become science fact.  The  book is in (vg/f) condition, w/ worn corners, spine is sun faded.  Thanks for looking.     gerry-2011-50