xvi CONTENTS. 



J'AGK 



Table showing the Annual Yield of Wheat in the 

 United Kingdom, per acre, during each of the 

 last thirty years, and in three periods of ten 

 years each 180 



Description of the " Fertile Belt " of the North- 

 West Territory of Canada, published by Mr. 

 Caird, in 1859, with Analysis of Prairie Soils 

 as described by Professor Voelcker 181 



