California Orange Grove
The picture shows a typical orange grove, such as may be seen either in southern or in northern California. Curiously enough the fruit comes to maturity in the northern part of the state, or at least in certain regions of the northern part, earlier than in southern California. The anomaly is explained as due to ocean currents, which modify the temperature with curious and unexpected results. In a recent year when oranges were destroyed by frost in the southern part of California, those in the northern part of the state escaped because they had already been picked for the market.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 4 Chapter 9