This 373 page book is 8.5 x 6.5. Numerous color pictorial illustrations on glossy paper are included in this volume. There are two formats only one of which I have seen. Their contents are identical.
The earlier 1918 book is pictured here. It has illustrated end papers.
The later post-1922 book is the same size but the cover has a pictorial appliqué.
See also Non Series #7