DATES OF PUBLICATION OF THE SEVERAL PARTS. 
OF THIS VOLUME. 
Part I., pp. 1-224, was published June, 1901. 
Part IT., pp. 225-448, was published May, 1910. 
Part ITI1., pp. 449-640, was published January, 1912. 
Part IV., pp. 641-end, was published June, 1912. 
