290 Literatur. 



Report of experiments with different manures on per- 

 manent meadow land by J. K. Lawes and J. H. Gilbert. 



Report of experiments on the growth of red clover by 

 different manures by J. K. Lawes and J. H. Gilbert. Lon- 

 don 1860. 



The catechism of agricultural chemistry by W. B. Te- 



getmeier. London. 



