Volume Number: 1 2 3 4 5 6 7 8 9 10 11 12
A Foot of Santa Rosa Walnuts
The picture shows the large size of the Santa Rosa walnuts, and the symmetrical form and smoothness of the shell. The shell itself is so thin that it can readily be crushed in the fingers.

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 2