4 INDEX TO PAPEES ON PLANT SUBJECTS IN YEARBOOKS. 



will be sent free of cost upon application to the Secretary of Agricul- 

 ture and may be designated by using the specific numbers assigned to 

 the extracts wanted; thus " YB 340" is a sufficient indication that a 

 copy is desired of Yearbook Extract No. 340, issued in the Yearbook 

 for 1904, entitled " Opportunities in Agriculture. I. Growing Crops 

 under Glass. II. Fruit Growing. III. General Farming." 



It is hoped that this index will prove a convenient key to the vast 

 storehouses of information on plant subjects contained in the series 

 of Yearbooks of the Department of Agriculture, of which the four- 

 teenth volume has only recently come from the press. 



September 25, 1908. 



[Cir. 17] 



