This certificate identifies Meyer as an agricultural explorer of the United States Department of Agriculture who was visiting Manchuria and other parts of China for "the purpose of Aiding in Agricultural Development, especially along the line of Pomology." It is likely that Meyer carried this certificate with him and used it to introduce himself and his research to people he encountered in China.
While on plant expeditions in Asia from 1910 to 1911, Meyer took photographs of expedition activities. Shown here are the original negatives and captions from the Plant Exploration Collection housed in Special Collections. Please click on the small images to view a larger version.