1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 5 glasses masks is signed at the bottom

is signed at the bottom but I am uncertain of its maker

that he represents some sort of ogre

the other of a street of row houses--illustrating word problems

10" with tail extended in either direction

1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 5 glasses masks is signed at the bottomI was pretty excited to find a box full of these handmade slides at the flea market this weekend a box in which many were rolled up in newspaper from 1945, seemingly untouched since then! What I've learned is that Carl W. Lange Sr. and Jr. , who copyrighted this set of stereoscopic slides in 1942, were father and son opthomologists with a practice near St. Louis and a particular commitment to curing myopia (nearsightedness.) They wrote and travelled