1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 1 vintage construction set especially as I’ve never seen

especially as I’ve never seen one like it before

I think it is truly an extraordinary object

including for the fact that the cow balances quite well on the back of the horse (though not quite so much vice verse

then fit back together to appear as one piece

1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 1 vintage construction set especially as I’ve never seenI 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 a St. Louis 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