Scott Steffens of weblog Contact Sheet came into possession of this old instructional booklet when his grandparents discovered it during housecleaning. Scott estimates it to be from the 1940’s - from an era when it was still proper to capitalize Telephone, much like the capitalization of Internet today. I searched hard to see if this book is still available for buying at some obscure Internet … oops, internet shopping site that sells vintage stuff. I couldn’t find any. All that remains are these nice scans that Scott so thoughtfully uploaded to his blog.
Also checkout this funny Illustrated baby handling guide for dumb parents