Some American Rotations. 



Potatoes. 



Wheat. 



Clover. 



Clover. 



Wheat, oats or rye. 



Roots. 



Wheat. 



Clover. 



Clover. 



Corn, oats or rye. 



Of General Interest. 



How to Copyright a Book, Map, Chart, Etc. 



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 or proprietor. No affidavit or formal application is required. A printed 

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 ing, chromo, statue, statuary, or model or design for a work of fine arts, for 

 which copyright is desired, must be sent by mail or otherwise, prepaid, 

 addressed "Librarian of Congress, Washington, D. C." This must be done 

 before publication of the book or other article. A fee of 50 cents, for record- 

 ing the title of each book or other article, must be inclosed with the title as 

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 copyright under seal of the Librarian of Congress, which will be transmitted 

 by return mail. Within ten days after publication of each book or other 

 article, two complete copies must be sent prepaid, to perfect the copyright, 

 with the address, "Librarian of Congress, Washington, D. C." Without 

 the deposit of copies above required, the copyright is void, and a penalty of 

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 , by , in the office of the Librarian of Congress, at Washington"; 



191 



Rotation on Crops. ^"^'^ ^""^ 



^ Plants 



In the changed conditions of agriculture elaborate systems 

 of crop rotation are no longer itecessary. With the help of 

 chemical manures and the judicious use of renovating crops 

 farmers are no longer subject to rigid rule, but may adapt 

 rotations to the varying demands of local market conditions. 



