December 28 , 1910 
To the Friends 
of the Smithsonian Institution: 
I take pleasure in introducing to you tho hearer 
of this letter. Professor H. A. Pittior, of tho Bureau 
of Plant Industry, Department of Agriculture, who is a 
member of tho Expedition sent out by tho Smithsonian 
Institution to raako a Biological Survey of the Panama 
Canal Zone. 
Any assistance which you may find it possible to 
give Professor Pittior in tho prosecution of his work, and 
any courtesies extended to him, will be highly appre¬ 
ciated by this Institution. 
Secretary. 
