I remember about 50 years ago, in the elementary school library where I went, they had "the boys first book of radio and electricity" or some title like that (there was also a second and third book). In it, they showed the plans for connecting an old Model A? spark coil to a vacuum tube wrapped with aluminum foil to generate your own X-Rays (and how to x-ray your hand etc onto film).
eeeeek !!
mikey
scientific
applicable).
vertebrate