PREFACE 



is necessarily repetitive. The best way to get in touch 

 with the work done since 1888 is by means of the Experi- 

 ment Station Record of the United States Department of 

 Agriculture at Washington. This is a technical review 

 of the world's scientific literature pertaining to agricul- 

 ture. Two volumes, of six monthly numbers each, are is- 

 sued annually at a subscription price of $1.00 a volume, 

 with a restricted free distribution to libraries, government 

 and state agricultural investigators, etc. It abstracts and 

 indexes the current agricultural literature, not only of the 

 United States Department of Agriculture and of the ex- 

 periment stations, but the more important periodical and 

 book publications of the world. Extensive and minutely 

 detailed indexes are published semi-annually and assem- 

 bled into combined indexes from time to time. By means of 



NURSERY AND FLORIST INDUSTRIES OF THE UNITED STATES 

 (Figures from Census of 1910.) 



these indexes the searcher may easily post himself as 

 to the scientific work reported on any agricultural subject 

 in the least possible time. In the preparation of this 



