Interesting, as a snapshot of history (written 1922). A noteworthy quote:

"Since 1900 it is safe to say the number of Soy Bean importations
from foreign countries exceeds several hundred."

There are over 19,000 soybeans in the USDA's collection at present.

The info on crossing was interesting, as well as the heritage of some of the varieties in my collection. It was also interesting to see so many colored soybeans discussed, since yellow has pretty much become the standard.

I liked the bean references, and found the photos somewhat useful... it would be even better if they were scanned in color. :-(