A boxcar of fruit equaled one lemon in this penny postcard from 1910, one of a series of imaginative cards issued by Edward H. Mitchell of San Francisco. The world's largest lemon grove for many years was located near Maxwell, just north of Sacramento, and in 1905 it was estimated that the returns per acre on lemons grown in the Valley ranged from $100 to $225. The top right corner of the card reads "I'm sending you a lemon from __________."
