APPENDIX. 



ON THE NATURE AND PREVENTION OF THE POTATO 

 DISEASE. 



AFTER the preceding pages were in print, I re- 

 ceived from Baron Liebig a copy of the Journal of 

 the Agricultural Association of the Grand Duchy 

 of Hesse (Darmstadt), No. 7, dated 15th February, 

 1848, containing the account of a method proposed 

 by Dr. Klotzsch (Keeper of the Royal Herbarium, 

 Berlin, and a distinguished Botanist and Vegetable 

 Physiologist), for preventing the ravages of the po- 

 tato disease. The proposal of Dr. Klotzsch, and 

 his views as to the nature of the disease, are such 

 as materially to strengthen the opinions expressed on 

 this subject by Baron Liebig (see pp. 87, seq.). As 

 a knowledge of the method suggested by Dr. 

 Klotzsch is likely to be interesting to many of the 

 readers of this work, I have thought it right to give 

 it in an Appendix. 



WILLIAM GREGORY. 



