Luther Burbank at the Age of Fifty
Thanks to good heredity, abstemious habits, and out of door living, Mr. Burbank was a young man at fifty, as this picture will testify. Although seemingly of rather delicate physique, he has always enjoyed a large measure of good health, and his supply of working energy is unlimited.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 12 Chapter 3