The last of the series of plates in this volume gives a graphic 

 illustration of the appearances 'presented by the so called Black 

 Mould in corn Cladosporium kerbarum). The serious harm 

 caused by this fungus both to Wheat and Barley plants rendered 

 it desirable that attention should be directed to this attack, and 

 that the distinction between this pest and the ordinary Wheat 

 Bust or Mildew (Puccinia graminis) pointed out. A special 

 inquiry has been conducted this year into various circumstances 

 attending the prevalence of Rust in Wheat, and it is intended to 

 issue as a separate , volume the information collected on this 

 point from various observers in this country, giving at the 

 same time some notice of the results, so far as they can be ob- 

 tained, of the recent researches which have been in progress 

 in other countries. 



Board of Agriculture, 

 December 1892. 



