First Edition. paperback. 76 pages. Tall 8vo, original printed wrappers; spine worn and front cover neatly reattached. Stuttgart: F. Enke, 1933. Neat ownership signature on title page, still a very good copy. very good.
Dingler, a "conventionalist", opposed Einstein's relativity theory and was therefore snubbed by most of the leaders of the German physics and mathematical communities.