-3- 



expei'imantal farL., the in-.'estigations in the production of domestic 

 tea, the work on foreijjn seed and plant introduction and the Congress 

 sional seed distribution .;ere laded, bj- executive order. 



After this coordinacion of the various division? which had been 

 issuiag bulletin? and circulars, the separate iivision series were dis- 

 continued, and ther3af"er. unti^ i9i2, all contributions were issued as 

 bulletins cr circulc.rs of tine Bureau of Plaxit Industry, except those 

 which appeared in the Departr'Snii Peports, Farraers' Bulletins or Year- 

 books. 



In 1912, the separate jiv.renu ser?.es of bulletins ana circulars 

 were discontinued, and the scries "United States Dep-arttnent of Agri- 

 cult-ure Bulletin ' was started, in .vhich v/ere included with continuous 

 numbering, the bulletins contributed by all bureaus. No department 

 circular series was started, but a few circulars were issued from dif- 

 ferent offices 01 the Bvjreau. with separate numbering for each office. 

 In 1913 a series of Eepartr^-.ent Circxdars was started, with the inten- 

 tion of thereafter including ail circulars in this series. 



At the present tice, tho Bureau of Piar.t Industry publishes the 

 results of its investigations in the following serie^i of department 

 pubiicaiioils: Annual report, Yearbook, Bull^tia, Circular, Department 

 Report, Office oT Secretai-y Circular, Fanners' Euiletin and Jourrial cf 

 Agricultural Hesearch. 



The present list is arranged, so far as possible, in chronologi- 

 cal order. This lia? not been possible in all cases, as soce of the 

 series overlap. Tne Montlily, Special and Department Heport.s, Office 

 of Secretai-y Circulars, the Faruiera' xiulietin series and the Yearbook 

 articles a,-e lisued first, as these are general series wiiich have been 

 ronnin^ for some time coinciaent vith series of the various divisions 

 and of the Bui-eau. The lists for tka general department publications, 

 U. S. Departaent of Agricxilture Bu"*. letin, Journal of Agricultural fie- 

 search and Departmert Circular follow the lists for the Bureau of Plant 

 Industry publications, as those be^an when the Bureau s^jries v/ere dis- 

 continued. 



No attenpt lia^ been made to sho// whether tha publications are 



available for distribution. Ivlost of the earlier series axe no longer 



available for free distribution, thou^ some of them may be on sale at 

 the Office of the Superintendent of DocuLisnts. 



Eunice R. Oberly, 



Librarian, Bureau of Plant Industry. 



January 1, 1921. 



