viii PREFACE. 



the aptness of the explanation which I gave him respecting 

 the details of the breaking lessons. 



In judging this work, I trust that my readers will give it 

 the attention it deserves, as the result of sixty years' serious 

 study and hard practical work. 



I crave the indulgence of the public, and the impartiality 

 of my reviewers. 



JAMES FILLIS. 



